Weather for the week: Widespread rain after the holidays - Beware of rough weather in northern Japan

2025/11/23 07:54

From the 25th (Tuesday) onwards, after the three-day holiday, low pressure and high pressure will alternate around Honshu, and the weather will change in short cycles. In northern Japan, there are likely to be days when the weather is stormy.



Tomorrow, the 24th (Monday), the last day of the three-day holiday, will be covered by high pressure mainly from the Pacific side of western to eastern Japan, and sunlight will reach the area. However, from Tohoku to northern Kyushu on the Sea of Japan side, clouds tend to spread due to the effect of a trough in the atmospheric pressure, and there are likely to be some areas with showers.



On the 25th (Tuesday), the end of the holidays, a low pressure system is expected to develop as it moves through the Sea of Japan. In addition, another low pressure system will form near the southern coast of Honshu and will continue to develop. As a result, it will rain over a wide area around Honshu on the 25th (Tuesday).
The two low pressure systems will merge into one over the sea east of Japan on the 26th (Wednesday), and the pressure around Honshu will be high in the west and low in the east. Northerly winds will become stronger in Hokuriku, on the Sea of Japan side of northern Japan, and northern Japan is likely to experience rough weather. In Hokkaido, there will be places where it snows, mainly in northern Hokkaido. On the other hand, in western Japan, where high pressure is overhanging, many areas are expected to be sunny.

A low pressure system will pass near the Sea of Japan from the 27th to the 28th. On the 27th (Thursday), there will be fewer places where it will rain, but on the 28th (Friday), the weather will deteriorate, mainly on the Sea of Japan side, and it will likely rain in many places.

From now on, daytime temperatures are expected to remain at or slightly higher than normal in many places, and the cold weather will ease for a while. However, the temperature difference between morning and afternoon tends to be large, so please take care of your health.

The middle days of the three-day weekend will be covered in high pressure and will be widely sunny, with rain likely in the northern Tohoku and Kanto coasts.

2025/11/23 06:46

Today, the 23rd (Sunday), the middle day of the three-day holiday, the area around Honshu will be covered by a band of high pressure. However, near the northern Tohoku region, the coastal areas of the Kanto region, and the Izu Islands, rain clouds will form due to the trough in the atmospheric pressure.



Akita Prefecture in the northern part of Tohoku will experience rain on and off due to the influence of a local front associated with a trough in atmospheric pressure. Localized thunderstorms are expected, so please be careful of lightning strikes. There are also likely to be some areas of showers in Aomori Prefecture and near the Oshima Peninsula in Hokkaido due to the influence of rain clouds associated with a trough in atmospheric pressure. When going out, it is better to carry a folding umbrella.

In the Kanto region, clouds will likely spread in the southern part of the country, and rain will start and stop in the coastal areas of Chiba and Ibaraki prefectures and the Izu Islands. There is also a possibility of showers in the morning in Tokyo and Yokohama. Sunny skies are expected to gradually return in the afternoon, but the maximum temperature during the day will likely be lower than yesterday. The expected maximum temperature in Tokyo is 13c, which is about 4c lower than yesterday. Please wear warm clothes when going out.

Other areas will be mostly sunny and there will be no major weather changes. In the inland areas of western Japan, there are likely to be places where thick fog will form in the morning. During the day, the temperature will rise to around 20c, making it a pleasant day. However, the air will be dry, so please be careful when handling sources of fire.

Tomorrow, the 23rd (Sunday), will be a sunny day for tourists, but from the 24th (Monday) onwards, the weather will be downhill.

2025/11/22 18:40

There is a developed low pressure system on the Kamchatka Peninsula, which is moving northeast.
On the other hand, there is a high pressure system moving eastward in the East China Sea, and it is spreading toward western and eastern Japan.

Today, there were initially a lot of clouds on the Sea of Japan coast from Hokkaido to the Hokuriku region, and there were some places where it snowed and rained, but the rain and snow gradually stopped and it was sunny across western and eastern Japan.



Tomorrow, high pressure will spread, and it will be sunny in many places nationwide, making it a good day for sightseeing.
There are many places where the temperature difference between daytime and morning and evening is large. Please wear clothes that can be adjusted.
Also, as there are many places where the air is dry, please be careful when handling fire.

Atmospheric conditions are expected to be unstable in parts of the northern Tohoku region and the Pacific coast of the Kanto region, and there may be some localized rain, so it's a good idea to bring a foldable umbrella.





On the last day of the three-day holiday, the 24th (Monday), a low pressure system and a trough of pressure will approach the Sea of Japan.
As a result, the weather will slowly go downhill, and clouds will spread over the Tohoku region and the Japan Sea side of eastern and western Japan. It looks like it will rain in some places.

After the holidays, on the 25th (Tuesday), a trough of atmospheric pressure will pass through the Japanese archipelago, and the weather is expected to deteriorate in many places across the country.

Temperatures are typical for this time of year in various places today, so be careful of the temperature changes throughout the day.

2025/11/22 08:03

Radiation cooling of Kesa is increasing, and the cooling is getting stronger mainly in western Japan. The lowest temperatures by 7 o'clock were -0.5 C in Sapporo, 3.9 C in Sendai, 7.4 C in Tokyo, 9.1 C in Kanazawa, 8.1 C in Nagoya, 8.6 C in Osaka, 8.8 C in Kochi, and 7.8 C in Fukuoka, and 142 locations have recorded the lowest temperatures this season.



Today, many places will be covered in high pressure, so it will be sunny in many places during the day, making it a good day for going out.

The maximum temperature during the day is expected to be 6c in Sapporo, 13c in Sendai, 17c in Tokyo, 16c in Kanazawa, 18c in Nagoya, 17c in Osaka, 19c in Kochi, and 18c in Fukuoka.

During the daytime, the temperature in many places is the same as the day before, and you can feel the warmth of the sunlight, but the temperature difference between morning and evening is large. If you are planning to go out such as viewing autumn leaves, please be careful when choosing your clothes.

The weather for today, the 22nd (Saturday): The first day of the three-day weekend is a perfect day for vacationers in many places. On the Sea of ??Japan side, it will be raining and snowing until morning.

2025/11/22 06:30

Today, the 22nd (Saturday), the first day of the three-day holiday, a high-pressure system will protrude from the west, and the area around Japan will gradually become covered in high-pressure systems. The weather on the Sea of Japan side is gradually improving, and it looks like it will be a good day for tourists in many places.



There will be rain and snow in places on the Sea of Japan side of northern Japan and Hokuriku until morning. The weather will improve in the afternoon, and the sun will return in some places in the afternoon. It looks like the Pacific side will be sunny and the blue sky will spread out.
During the day, many places will be lower than the previous day, and the temperature will be typical of this time of year.

From the Kanto region to western Japan, the weather will be mild and sunny, making it a perfect day for tourists. It looks like it would be a good idea to go viewing the autumn leaves. You can feel the warmth of the sunlight during the day, but it can get cold in the mornings and evenings, so be careful when choosing what to wear.

There are times when clouds spread out in Okinawa, but there are many places where it will be sunny.

[Three-day weekend weather] The first half of the holiday is perfect for going out and viewing autumn leaves, and there are some places where it rains on the last day.

2025/11/21 16:42

I think many people will have a three-day holiday starting tomorrow, November 22nd (Saturday), and the first half of the holiday will be a good day for going out and going on vacation.



From the 22nd (Sat) to the 23rd (Sunday, Labor Thanksgiving Day), the
area around Honshu is expected to be covered in high pressure and have many sunny days.

However, on the 24th (Monday, a substitute holiday), the center of the high pressure system will move to the east,
and moist air will gradually flow in, resulting in generally cloudy weather.



Looking at the rain forecast for noon on the 24th (Monday),
it is expected to start raining in areas on the Sea of Japan side, and
it is likely to rain in some places on the Pacific side, such as the Kanto region, from the evening onwards.

It's safe to bring rain gear when you go out.

However, the amount of rain is not that large, and there are few places where it will rain heavily.



If you look at the temperature during the holidays,
during the day in western and eastern Japan, it will be around 18-20c,
a comfortable temperature typical of this time of year.

Sapporo will be 6c tomorrow, the 22nd (Saturday), making it necessary to wear a coat during the day, but it will be 12c on the 23rd (Sunday), and 14c on the 24th (Monday), so the cold will ease day by day.

However, radiative cooling will be stronger at night and it will be cold in the morning.
Please be careful not to get sick due to the difference in temperature between morning and evening and during the day.

Also, the weather continues to be sunny, mainly on the Pacific side, and the air is dry.
Please be careful when handling fire sources and fire.

A cold front is passing through northern Japan and Hokuriku. Be careful of rain, snow, gusts, and hail; the pressure gradually shifts to high in the west and low in the east.

2025/11/21 11:53

Today, the 21st (Friday), a low pressure system is moving northeast across the Sea of Okhotsk, and a front extending from the low pressure system is passing through northern Japan and Hokuriku.
As warm, humid air is flowing toward the front, atmospheric conditions are extremely unstable on the Sea of Japan side of northern Japan and Hokuriku.
Cumulonimbus clouds will develop and there will be places where thunderstorms will occur.
After the front passes, the atmospheric pressure is expected to be high in the west and low in the east, centered on northern Japan.



Today, the afternoon of the 21st (Friday), the Sea of Japan side of Hokkaido will gradually start to snow in more places.
On the Sea of Japan side of Tohoku, it is expected that there will be places where it will start to rain or snow in the evening.
Also, the atmospheric conditions will become even more unstable tonight as cold air in the upper atmosphere will pass near northern Japan.
Please be careful of temporary heavy rain, lightning, gusts of wind, and hail.
Especially in the southern part of Tohoku on the Sea of Japan side, there are places where the ground has become loose due to previous rains, so even a small amount of rain could increase the risk of landslides.
Please be careful of landslides caused by heavy rain late into the evening of today, the 21st (Friday).
Tohoku Pacific side is expected to experience showers and snow showers.
It will rain on and off in Hokuriku.



Tomorrow, the 22nd (Saturday), the first day of the three-day holiday, the atmospheric pressure is expected to be high in the west and low in the east, centered on northern Japan.
There will be places where the isobars are closely spaced and strong winds will blow, especially in northern Japan.
Please be careful of strong winds and snow.
Into the morning, snow is expected on the Japan Sea side of Hokkaido, rain and snow on the Japan Sea side of Tohoku, and rain in Hokuriku.
After that, the high pressure system to the east of Japan will gradually expand, and the pattern of high pressure in the west and low pressure in the east will loosen.
The weather is expected to improve on the Sea of Japan side of northern Japan and Hokuriku.

Winter type atmospheric pressure pattern does not last long; dry with little rain; be careful with fire; high temperatures trend in northern Japan [1-month forecast]

2025/11/20 16:42

Today, the 20th (Thursday), the Japan Meteorological Agency announced the weather forecast for the next month (11/22 to 12/21).
The average sea level pressure for the next month is expected to be lower than normal over mainland China, and the Siberian high is expected to be weak near the Sea of Japan.
For this reason, the winter-type air pressure distribution will not last long and will be less affected by cold air.
In addition, the atmospheric pressure is higher than normal from the East China Sea to the southeast of Japan, and it is expected that a mobile anticyclone will likely cover eastern and western Japan.
The temperature at an altitude of approximately 1,500 meters is predicted to be higher than normal, mainly in northern and eastern Japan, as the cold air is weakly moving southward.



#Temperature over the next month (11/22 - 12/21)
As it is less affected by cold air, the temperature over the next month will be high in northern Japan, and at or above normal in eastern Japan.
Western Japan and Okinawa/Amami are expected to be at normal levels.
The first week, from November 22nd to November 28th, is expected to be high in northern Japan, and eastern Japan is expected to be near normal or above average.However, in the second week, from November 29th to December 5th, it is expected to be near normal in northern and eastern Japan as well.
In northern and eastern Japan, it seems like the weather will suddenly get colder in December.
Also, on sunny days covered by high pressure, the mornings and evenings become colder due to radiation cooling.
Please take care of your physical condition as the temperature difference between morning and evening and during the day is large.



#Precipitation and snowfall for the next month (11/22-12/21)
As there are periods when the area is easily covered by a mobile anticyclone and is less affected by the winter pressure distribution, precipitation over the next month will be low on the Pacific side of eastern Japan, western Japan, and Okinawa/Amami, and will be at or below normal on the Sea of Japan side of eastern Japan.
There are many sunny days and the air tends to be dry, so please be careful when handling fire and preventing infections.
The amount of snowfall over the next month is expected to be low on the Sea of Japan side of northern and eastern Japan.
However, the winter-like atmospheric pressure pattern may temporarily strengthen, causing stronger snow and increased snowfall.



#Sunshine hours for the next month (11/22-12/21)
The sunshine hours for the next month will be high on the Pacific side of eastern Japan and western Japan, and will be at or above normal on the Pacific side of eastern Japan and the Sea of Japan side of eastern Japan.

# Weather for the next month (11/22 - 12/21)
On the Sea of Japan side of northern Japan, there are expected to be fewer cloudy, snowy, or rainy days compared to normal years.
The Sea of Japan side of eastern and western Japan will have fewer cloudy, rainy, or snowy days than normal.
The Pacific side of northern and eastern Japan is expected to have more sunny days than normal.
On the Pacific side of western Japan, the weather changes every few days, but there will be more sunny days than normal.
Okinawa/Amami is expected to have many cloudy and rainy days, similar to normal years.

What's the weather like for the last three-day weekend of this year Stormy weather again after the holidays [Weekly weather]

2025/11/20 12:08

I think many people will have a three-day holiday from November 22nd (Sat) to 24th (Monday, substitute holiday), but this will be the last three-day holiday of the year.

So, what will the weather be like during the holidays


#Kesa is getting colder, and the first snow has fallen in Mito#

Kesa has become colder due to the strong cold air that has been flowing into the sky since yesterday, November 19th (Wednesday) and
radiant cooling.

Kesa observed the first snow in Mito, 29 days earlier than normal.
This is the first time this season's first snow has been observed in the Kanto region.



The strong cold air in the sky will leave tonight, but a new low pressure system with a front will approach northern Japan,
and the weather is expected to go downhill again.

#Rain and snow will return to northern Japan and Hokuriku tomorrow#

Rain and snow will fall in northern Japan tonight and into tomorrow,
The intensity of the rain will increase in some places, accompanied by thunder.

In Yamagata and Niigata prefectures, if the rain clouds become more stagnant than expected,
there is a risk of warning-level heavy rain.

Also, due to the temporary influence of cold air,
rain during the day tomorrow will turn to snow in Hokkaido and other areas at night.

On the other hand, many places on the Pacific side of western and eastern Japan will have sunny skies,
and the air will continue to be dry. Please be careful when handling fire.




#The first half of the holidays is a good day for going out and going on excursions#

From November 22nd (Sat) to November 23rd (Sunday, Labor Thanksgiving Day), it is expected to be covered by an anticyclone and clear skies mainly on the Pacific side.
On the Sea of Japan side, snow and rain only last for a short time, so you can enjoy going out and going on vacations.

In the mornings and evenings, radiation cooling becomes stronger and it gets colder, but
during the daytime, the temperature is typical of this time of year and you can feel the warmth of the sun.

However, on the 24th (Monday, a substitute holiday), the last day of the long weekend,


The high pressure system will move away to the east and moist air will flow in, so it is likely to be cloudy and rainy in many places.

It looks like there will be a lot of rain, especially around the Sea of Japan, so
it would be a good idea to bring rain gear when you go out.



#At the beginning of the week, the weather will be rough again#

Around the 25th (Tuesday), after the holidays, a low pressure system will develop
as it moves from the Sea of Japan to the vicinity of Hokkaido, so
there is a risk of strong rain and winds mainly on the Sea of Japan side of northern and eastern Japan, resulting in rough weather.
The wind will also be strong on the Pacific side.

Cold air will flow into the sky on the 26th (Wednesday),
It will snow in northern Japan, and there will likely be snow in some places in the high mountains of eastern Japan.

After that, low pressure systems often pass through, and it rains every few days, but
temperatures change gradually, and the path to winter seems to be slow.

While northern Japan is experiencing midwinter cold, Okinawa continues to experience midsummer days. Due to Typhoon No. 26, Okinawa experienced record heavy rain (Weather Summary November 9th to November 15th, 2025)

2025/11/20 06:50

This is a summary of the weather for this period (November 9th to November 15th, 2025).

#Summary of the weather for this period (November 9th to November 15th)
The average temperature was due to the strong cold air moving southward due to the winter-like atmospheric pressure distribution, resulting in midwinter cold in northern Japan, mainly in Hokkaido, and in places such as Abashiri, it was nearly 1 C below normal. On the other hand, Okinawa, Amami, and Kyushu are susceptible to the effects of warm air from typhoons and cyclones, and temperatures tended to be higher than normal.

Record heavy rainfall occurred in Okinawa and Amami, which were affected by Typhoon No. 26 and the front, and the total precipitation for the period was significantly higher than normal. On the other hand, although there were periodic weather changes around Honshu, the Pacific side of northern Japan was not particularly susceptible to the effects of low pressure systems and fronts, resulting in precipitation well below normal.

Sunshine hours tended to be higher than normal on the Pacific side of northern Japan, which was less susceptible to the effects of low pressure and fronts, and below normal on the Sea of Japan side of Hokkaido, southern Kyushu, and Okinawa/Amami, which were more susceptible to the effects of low pressure and fronts. In many places, temperatures in eastern and western Japan were at or slightly below normal.



[About this period's weather]
#Characteristics of pressure distribution
On the 9th, a low pressure system accompanied by a front moved northeast across the Sea of Japan, and another low pressure system accompanied by a front moved eastward from northern Kyushu to the southern coast of Honshu. Typhoon No. 26 passed near the Philippines. On the 10th, two low pressure systems accompanied by a front moved over the Sea of Okhotsk and east of Japan, forming a winter-like pressure pattern around Honshu. The front is stationary from the east of Japan near the Nansei Islands. On the 11th, the winter-like atmospheric pressure pattern continued around Honshu, and the front remained stationary from the east of Japan to the vicinity of Taiwan. Typhoon No. 26 is heading north in the South China Sea. On the 12th, high pressure became dominant near Honshu, and the winter-like pressure pattern loosened. The front has stalled in the Nansei Islands, and Typhoon No. 26 is moving northeast near the Bashi Strait. On the 13th, Typhoon No. 26 became an extratropical cyclone, merged with a front, and moved northeast through the East China Sea. A low pressure system accompanied by a front passes near Sakhalin. On the 14th, a low pressure system accompanied by a front moved over the Sea of Okhotsk, and a low pressure system accompanied by a front moved eastward over the sea south and east of Japan. A winter-like pressure pattern briefly formed near Honshu, but on the 15th, high pressure became dominant, and the winter-like pressure pattern loosened.

#Precipitation
On the 9th, the area of rain expanded due to the influence of two low pressure systems that were developing and moving near Honshu. In the Izu Islands, heavy rain of 39.5 mm/h was observed on Miyakejima at night. On the 10th, a winter-like atmospheric pressure pattern strengthened, bringing rain and snow mainly from northern Japan to Hokuriku on the Japan Sea side. In Sukayu, Aomori Prefecture, 10 cm of snowfall was recorded in 3 hours. On the 11th, due to the moist air from Typhoon No. 26 and the influence of the front, heavy rain is believed to have fallen in the eastern part of Kunigami Village, Okinawa Prefecture, with an hourly rainfall of about 110mm, and information on heavy rain in a record time was announced. First snow observed in Kushiro and Aomori. On the 12th, rain continued in the Okinawa area due to the influence of the humid air around the typhoon. Heavy rain of 47.0mm/h was observed on Kumejima, Okinawa Prefecture. On the 13th, it rained widely in southern Kyushu and Okinawa due to the influence of an extratropical cyclone that changed from Typhoon No. 26. The 72-hour precipitation on Kumejima reached 416.5mm, breaking the record for November. On the 14th, a winter-like atmospheric pressure pattern brought rain and snow from northern Japan to the San'in area on the Sea of Japan side. On the 15th, the winter-like atmospheric pressure pattern loosened, and it rained in Ama, Oki District, Shimane Prefecture, and Hachijo Island, and there was almost no noticeable precipitation near Honshu.

#Temperature
On the 9th, the temperature did not rise in eastern Japan due to the cold rain. The highest temperature in central Tokyo was 13.7c, which was observed in the early morning hours. Meanwhile, Naha City and Miyakojima recorded their first midsummer day this month. On the 10th, temperatures in northern Japan dropped from the previous day as cold air moved south. Sunshine has reached the Kanto region, and the highest temperature in central Tokyo is 20.7 C, nearly 7 C higher than the previous day. On the 11th, cold air brought winter chill to the Sea of Japan and Okhotsk sides of northern Japan, and it was midwinter in Shirataki, Engaru Town, Hokkaido, Yubari City, and Sukayu, Aomori Prefecture. On the 12th, it was extremely cold in the morning due to radiation cooling, and the lowest temperature in the morning in central Tokyo was 8.1c. On Kumejima, the maximum temperature is 30.0c, the latest midsummer day. On the 13th, Naha City recorded the second-latest midsummer day on record due to warm air. Temperatures in eastern Japan are dropping due to cold winds blowing from the north. On the 14th, temperatures in western and eastern Japan, covered by high pressure, were similar to October. Northern Japan is getting colder due to the effects of cold air, with the highest temperature in Sapporo being 6.0c. On the 15th, temperatures rose in western and eastern Japan with mild, sunny skies. Northern Japan continued to be cold.