Warning-level heavy rain in the Kanto region on Christmas, followed by "intense cold" and warning-level heavy snow, affecting traffic [Weekly weather]

2025/12/24 12:09

Today, the 24th (Wednesday), Christmas Eve, it is raining nationwide due to the passage of a
low pressure system and front.

A low-pressure system is expected to develop towards the east of Japan over the next Thursday, the 25th (Thursday) and Christmas,
and another low-pressure system is expected to pass from the Sea of Japan to the Tohoku region.



Due to the influence of warm and humid air heading towards a low pressure system, it is likely that there will be warning-level heavy rain in places such as the Kanto region into tomorrow.



Looking at the cumulative precipitation for the three hours up to 5pm today, the 24th (Wednesday),
there are widespread rain clouds around Honshu,
especially in Chiba Prefecture, where there is a risk of heavy rain as the area is shown in orange.

In areas such as Chiba Prefecture and the Izu Islands, there are places where
heavy rain with thunderstorms will fall from evening to night, and
heavy rain warnings may be issued.




Furthermore, the next low pressure system will form near Honshu tomorrow, the 25th (Thursday), so it is expected to rain over a wide area tomorrow morning.

There is a risk of heavy rain again in Kyushu, Chugoku, and the Tokai region.

There will be widespread rain from Christmas Eve to Christmas, with the possibility of heavy rain in some areas.

Please take precautions against rain when going out.

After this rain, the strongest cold air of the season will flow in westward.



Looking at the cold air forecast at 9 a.m. on Friday the 26th, the coldest air of the season is expected to flow westward.

Cold air of -6 degrees Celsius or lower (the standard for snow on flat land) at around 1500 meters above the ground is expected to flow from western Japan and the Tokai region to Hokuriku and the Sea of Japan side of northern Japan.

Furthermore, even stronger cold air, below -12c, is expected to flow into Kyushu and the Chugoku/Shikoku region.

The coldest temperature so far this season (cold air flowed in) was on December 4th (Thursday), when it was -7.2c at 1500m above Fukuoka.

This time, the temperature is expected to be about 5 degrees Celsius lower than the previous strong cold, and the cold that starts on the 26th (Friday) can be said to be the ``strongest cold of the season.''



Looking at the forecast for snow, rain, and wind at 9 a.m. on the 26th (Friday) the next day, there will be widespread snow and rain from the Sanin area to the northern Sea of Japan side.

There are likely to be warning-level heavy snowfall in some places, especially in Hokuriku.

In addition, snow clouds will move into southern Kyoto and Mie prefectures on the Pacific side, and
snow will also fall on the flatlands of western Japan.




Let's take a look at the weekly weather to see how long this season's strongest cold air will last.

There will be rain in many places in Tohoku until the 25th (Thursday), but from
26th (Friday) there will be snow in many places in northern Japan and Hokuriku.

Please be aware of poor visibility due to heavy snow or blizzard.

Also, traffic may be affected, so
Please check the latest weather and traffic information when you return to your hometown or other outings.

On the 27th (Saturday), the lowest temperature in Sapporo will be -7c, and the highest temperature will be -3c,
It will be a "midwinter day" with negative temperatures throughout the day.

Even in sunny Tokyo, it will be as cold as 9 degrees Celsius, a mid-winter cold.

After the 28th (Sunday), the cold air will gradually disappear, and
the temperature is expected to finally return to the temperature typical of this time of year.

A rainy Christmas nationwide, followed by strong cold air and winter-like atmospheric pressure on the 26th

2025/12/24 10:19

There is a high pressure system over the sea east of Japan, and it is moving away to the east.
On the other hand, there is a low pressure system accompanied by a front in the northeastern region of China and the Sea of Japan, and there is also a low pressure system in the East China Sea, both of which are moving northeast.

Currently, there are places where it is snowing and raining in Hokkaido and northern Tohoku, rain and snow from southern Tohoku to Koshin, and rain from Kinki to Okinawa.

Today, the 24th (Wednesday), a low pressure system and a front will approach from the west, resulting in poor weather across the country. It looks like it will be a rainy Christmas in many places this year.

There are some places in Okinawa where it will rain in the morning, but it is expected to gradually increase.
It is expected to rain and snow in Hokkaido, with intermittent rain continuing from Kyushu to Tohoku, and heavy rain with thunder in some places.
Please be careful.

The maximum temperature will be around average or slightly higher in many places, but the Kanto region is likely to experience mid-winter temperatures.



Tomorrow, the 25th (Thursday), there will be a trough of atmospheric pressure near Japan, with rain over a wide area, and snow and rain in Hokkaido.
The highest and lowest temperatures will likely be at or above normal in many places.



On the 26th (Friday), a winter-type pressure distribution will occur with a successful east low.
A strong cold air is moving south, and the temperature will drop significantly in many places.
There is a risk of snow falling from Hokkaido to the San'in region on the Sea of Japan side, and there is a risk of heavy snow or blizzard, so please pay attention to future information.

[3-month forecast] Dry air on the Pacific side of eastern and western Japan. Be careful when handling fire. Northern Japan will be hotter than normal in March. Be careful of damage from melting snow.

2025/12/23 16:51

Today, the 23rd (Tuesday), the Japan Meteorological Agency announced the weather forecast for the next three months (January to March).
Temperatures over the next three months will be at or above normal in northern Japan, as they will not be affected by cold air.
In particular, the temperature in March next year is likely to be higher than normal in northern Japan, and the footsteps of spring are likely to be felt earlier than normal, but we need to be careful about the damage caused by snowmelt.
Precipitation over the next three months will be less affected by low pressure, so it will be low on the Pacific side of eastern and western Japan and Okinawa and Amami, and will be at or below normal on the Sea of Japan side of western Japan.
Although it is originally a dry period mainly on the Pacific side, there is a possibility that precipitation in January and February next year will be lower than normal on the Pacific side of eastern and western Japan.
This is the season when forest fires occur frequently, so please be careful when handling fire.



Expected characteristics of the ocean and atmosphere
Sea surface temperatures in the equatorial Pacific Ocean will gradually disappear from low conditions in the central and eastern regions, but will remain high in the western regions.
Meanwhile, sea surface temperatures are expected to remain low in the Indian Ocean.
For this reason, cumulonimbus clouds are likely to occur from Indonesia to the vicinity of the Philippines.
As a result of these effects, upper-level westerly winds are expected to meander northward over eastern Eurasia and southward near Japan, but are expected to flow at generally normal positions.
The Siberian High is weak on the northeast side, and there will be periods when its overhang to the southeast is somewhat strong.
From these facts, it is expected that there will be a period when the northerly seasonal winds will be strong toward the Philippines, and the winter-like pressure pattern will be strong in western Japan, Okinawa, and Amami.
The Pacific side of eastern Japan, western Japan, and Okinawa/Amami will be less susceptible to the effects of low pressure.
On the other hand, the winter-like atmospheric pressure pattern will not last long, especially in northern Japan, so it is unlikely to be affected by cold air.
However, there is a possibility that cold air will temporarily flow into northern Japan, causing heavy snowfall that will rapidly increase snowfall in a short period of time, especially along the Sea of Japan side.





#January
The Pacific side of eastern and western Japan is less affected by low pressure, so there will be more sunny days than normal.
The average temperature in Okinawa and Amami is expected to be at or below normal.
Precipitation will be at or below normal on the Pacific side of eastern and western Japan, Okinawa and Amami.

#February
As it is less affected by low pressure, the Pacific side of eastern and western Japan is expected to have more sunny days than normal, while the Sea of Japan side of western Japan is expected to have fewer cloudy, snowy, or rainy days than normal.
Average temperatures will be near normal throughout the country, and precipitation will be near normal or below normal in the Pacific side of eastern Japan, western Japan, and Okinawa/Amami.

#March
In eastern and western Japan, Okinawa and Amami, the weather is expected to change every few days.
The average temperature will be higher than normal in northern Japan, and at or above normal in eastern Japan.
Precipitation is expected to be at or below normal in Okinawa and Amami.

[Forecast of 7c tomorrow in Tokyo] A change from the original forecast - severe cold and cold rain on Christmas Eve

2025/12/23 13:03

Today, the 23rd (Tuesday), is covered by high pressure, and many places are experiencing mild winter skies.

However, at night, the center of the high pressure will move away to the east of Japan,
humid air will flow in from the south,
and there will be places in the Kinki and Kyushu regions where it will start to rain.



Looking at the forecast weather map for the night of tomorrow, the 24th (Wednesday),
two low pressure systems are expected to pass across Honshu.

As a result, it will rain across the country tomorrow, the 24th (Wednesday).




The influence of warm, humid air flowing towards the low pressure system and front will make the atmospheric condition unstable, and heavy rain with thunder is likely to occur in some places in Kyushu into the morning of the 24th (Wednesday),
in the southern Kinki and Tokai regions after the evening.

There will be rain and thunderstorms in the Kanto region from dawn and in the Tohoku region from noon, and there is a possibility that the rain will become stronger.



The initial forecast was for a strong flow of warm air toward a low pressure system,
As of yesterday, the predicted maximum temperature in Tokyo on Wednesday the 24th was 12c.

However, today it is forecast that northerly winds will strengthen towards the low-pressure system moving along the southern coast of Honshu,
and the forecast has changed to the forecast that temperatures will drop significantly, especially near the Kanto region.

It is expected to be as cold as mid-winter at 7c in places like Tokyo and Saitama, and 8c in places like Yokohama and Utsunomiya.

Initially, it was predicted that it would be a warm Christmas in the Kanto region, but
the forecast has drastically changed to severe cold and freezing rain.
Please be careful not to get sick due to changes in temperature.



A fairly strong cold air
(the strongest cold air this season over western Japan) is expected to flow westward around the 26th and 27th.

The long-term forecast predicted a ``warm winter'' this year, but
sometimes strong cold air will flow in and the daily temperature difference will be quite large.

As forecasts may change significantly in the future,
Please check the latest weather information.

Weather for today, the 23rd (Tuesday): Sunshine will reach a wide area; watch out for showers at night, mainly on the Pacific side of western Japan

2025/12/23 06:22

Today, the 23rd (Tuesday), high pressure will move near Japan, and the winter-like pressure pattern will loosen. During the day, sunlight will reach many places, but the weather seems to be heading downhill in western Japan.



In northern Japan, the weather will improve and many places will be sunny during the day. Clouds tend to spread in the evening, and there are likely to be some places in Hokkaido where it will begin to snow late at night. If you are returning late, it is a good idea to have a folding umbrella just in case.

It will be sunny in many places from eastern Japan to western Japan, covered by high pressure. From the afternoon onward, clouds are expected to spread from the East Sea to the Pacific Ocean to the west, and rain is expected to begin at night. Even if it's not raining when you go out, it's a good idea to have rain gear ready.
The Kanto region will have clear blue skies. The weather will be bad tomorrow, so please take advantage of the sunshine.

Tomorrow morning will be cold in many places, and the temperature rises slowly during the day, making it cold enough for this time of year.

2025/12/22 19:38

Today, the 22nd, there was a winter-like atmospheric pressure pattern around Japan, and as the cold air in the sky moved southward, the rise in temperature was slow and it was a cold day across the country.



Tomorrow, the 23rd, the area around Japan will be covered in high pressure, and many places will be sunny from the morning, and the morning will be colder due to radiation cooling.
The predicted minimum temperature for tomorrow is -5c in Sapporo, -1c in Sendai, 3c in Tokyo, 4c in Nagoya, 2c in Kanazawa, 4c in Osaka, 3c in Kochi, and 7c in Fukuoka.
Please take proper measures to protect yourself from the cold as the temperature will be below this morning's lowest temperature in all areas.



The temperature is not expected to rise much during the day, as the effects of cold air will remain even in regions where it will be sunny, especially in northern and eastern Japan. The cold winter will continue in many places around this time of year. On the other hand, in western Japan, there will be less impact from the cold air, and the daytime temperature will be higher than today, making it a pleasant and sunny day.
The predicted maximum temperature is Sapporo 1c, Sendai 7c, Tokyo 11c, Nagoya 13c, Kanazawa 13c, Osaka 14c, Kochi 16c, and Fukuoka 18c.

Widespread rain on Christmas Eve Heavy snow and blizzard on the Sea of Japan side after Christmas Will affect the rush to return home Some days go from extremely high to low.

2025/12/22 12:34

Weekly Weather Forecast
# Widespread rain on Christmas Eve, some places still have Christmas rain
#26th, winter-type atmospheric pressure distribution Stormy weather on the Japan Sea side Heavy snow, blizzard affecting return home
#Significant high temperature around Christmas After that, lower than normal temperature What about the New Year holidays



#Christmas Eve: Widespread rain. Christmas rain will remain in many places.
Around the Kinki region, clouds will increase due to a trough in atmospheric pressure and humid air, and rain is expected to occur in some places from the evening onwards.
The day after Christmas Eve, the 24th (Wednesday), a low-pressure front accompanied by a front will move eastward over the Sea of Japan, and a new low-pressure system will form near the Kii Peninsula and move eastward along the southern coast of Honshu.
In the morning, it is starting to rain in some places in the Kinki region and eastern Japan, and before noon it will start raining in Kyushu, Chugoku, and Tohoku, and it is expected to rain over a wide area in the afternoon.
Atmospheric conditions will be unstable as warm and humid air flows in towards a low pressure system and front.
Please be careful of lightning strikes, gusts of wind, and localized heavy rain mainly in the Kinki region and the Pacific side of the Tokai region.
In addition, due to the influence of this warm air, there are many places in Hokkaido where it will rain, and there will be places in the north where it will be wet and snowy.
Please be careful of deteriorating road conditions.
Christmas Day, the 25th (Thursday), will continue to rain in some places due to the effects of low pressure and fronts, and northern Hokkaido will likely be the area where it will snow and lead to a white Christmas.



#26th winter-type pressure distribution Stormy weather on the Sea of Japan side Heavy snow and blizzard impact return home
After Christmas, the low pressure system and front will pass, and the area around Japan is expected to experience a temporary winter-like atmospheric pressure pattern on the 26th (Friday).
Strong cold air is expected to move southward, and the cold air will reach its peak from the 26th (Friday) to the 27th (Saturday).
Cold air with temperatures below -6c at an altitude of 1,500m, which is a guideline for snowfall on flatlands, is expected to move south to northern Kyushu, Shikoku, the Kii Peninsula, and the Kanto region, and even stronger cold air with temperatures below -12c is expected to move south to parts of Hokuriku and southern Tohoku.
There will be places in the sky above Hokkaido where very strong midwinter cold air, around -18c, will flow in.



It is expected that the weather will be rough, mainly in the Sea of Japan side of western and northern Japan.
Depending on how the winter-type air pressure distribution strengthens, heavy snow may fall in a short period of time, mainly in Nagano Prefecture and Hokuriku, leading to warning-level heavy snow.
There will be strong winds, snow, and high waves.
Winds will become stronger nationwide, so be careful of strong winds and high waves.
Transportation may be affected, and the rush to return home is about to begin, so please keep an eye on the latest weather and traffic information.

#Significant high temperatures around Christmas, then lower temperatures than normal during the year-end and New Year holidays





The temperature difference is likely to increase over the next week.
From Christmas Eve to around Christmas, warm air will move in toward low pressure systems and fronts, and temperatures will be much higher than normal.
In snowy areas, be careful of avalanches and melting snow.
On the other hand, after Christmas, the cold air is expected to move south and temperatures will be below normal, making it even colder.
During the year-end and New Year holidays, temperatures will be near normal in Okinawa and Kyushu, while temperatures elsewhere will be high, and temperatures north of the Kanto region will once again be quite high.

Today, the 22nd (Monday), is the 24th seasonal ``winter solstice.'' The northerly wind is cold, and the cold of winter returns nationwide.

2025/12/22 06:45

Today, the 22nd (Monday), is the 24 solar terms ``Winter Solstice.''

The "winter solstice" of the twenty-four solar terms is the day in the Northern Hemisphere when the night is the longest and the daylight hours are the shortest. Although it is the middle of winter according to the calendar, it means that the cold and harshness of winter is about to begin.

The winter solstice is famous for the custom of taking a yuzu bath and eating pumpkin.
"Yuzuyu" is said to heal cracks and chapped skin, improve blood circulation, and help prevent colds.
The custom of eating ``pumpkin'' is carried out on the turning point of the winter solstice to provide nutrients in order to survive the coming winter when fresh vegetables will be scarce.



Now, today, the 22nd (Monday), the "winter solstice," the fronts and low pressure systems that brought widespread rain until yesterday will move away to the east of Japan. A high pressure system protrudes from the continent near Honshu, forming a temporary winter-like pressure pattern around Honshu.
Because the isobars are closely spaced vertically and cold winds blow from the north, it will be much colder in many places than on the 21st.

The Sea of Japan coast from northern Japan to the San'in area will experience cold rain and snow in many places, especially in the morning. There are places in Hokkaido where snowstorms occur, so please be careful of poor visibility. Even in the Kanto region, there are likely to be some areas with showers along the southern coast.
As high pressure becomes dominant in the afternoon, the rain and snow are expected to stop in the afternoon, and the weather is expected to start to recover.

The wind is cold today, and it may actually feel colder than the temperature. Tonight, take a soak in the yuzu bath to warm your body to the core before resting.

10-day weather forecast. Rain is forecast nationwide this Christmas. What will the weather be like from then until New Year's Eve

2025/12/21 22:50

The weather toward the end of next year is likely to be wide-spread rain due to the effects of low pressure and fronts, and strong cold air moving southward will likely lead to heavier snow, especially on the Sea of Japan side. There is a possibility of rain around the 31st (Wednesday) of New Year's Eve, mainly on the Sea of Japan side.



Tomorrow, the 22nd (Monday), there will be a temporary winter-like atmospheric pressure pattern, which will bring rain and snow from the Japan Sea side of northern Japan to Hokuriku and the Sanin area. However, the rain and snow are expected to mainly occur in the morning and stop in many places by the afternoon.
The Pacific side of northern Japan and western Japan will be largely sunny. It is expected to become sunny in many places the day after tomorrow and into the 23rd (Tuesday).



A low pressure system or front is expected to pass near Japan around Christmas on the 24th (Wednesday) and 25th (Thursday). Rain will be widespread across the country, and there will be some places on the Pacific side of western and eastern Japan with heavy rainfall. Hokkaido is expected to experience snow on the 25th.

Then, with the passage of a low pressure system and front, strong cold air in the upper atmosphere will move southward, and from around the 26th (Friday) to around the 28th (Sunday), snow is likely to fall in many places, mainly from northern Japan to the Sea of Japan side of the San'in region. Temperatures will drop significantly, and in some places it will be as cold as mid-winter. In areas along the Sea of Japan, there is a possibility of heavy snowfall during the rush to return home, so please be sure to check the latest weather and traffic information.

Around the 29th, the Tohoku Pacific side and Kanto region will be affected by a low pressure system, and there is a possibility of rain mainly in coastal areas. Around the 31st, a low pressure system will approach Japan, and it is likely to rain in some places, especially on the Sea of Japan side. It will be sunny in many places from western Japan to the Pacific side of eastern Japan. Be careful when handling sources of fire as the air will be dry.

Temperatures will plummet in northern Japan tomorrow, with snow and rain on the Sea of ??Japan side! It rained nationwide from the 24th (Wednesday) to the 25th (Thursday).

2025/12/21 17:57

There is a well-developed low pressure system in the Sea of Okhotsk, and a front is extending through Hokkaido and the Sea of Japan into the San'in region.
There is also a low pressure system in the south of Shikoku, moving northeast.
On the other hand, there is a high pressure system over the continent that is protruding to the east.

Currently, there are places in the mountains from Hokkaido to the Kinki region where it is raining and snowing.
Today, due to the influence of air from the south blowing into the front, it became unseasonably warm and rain fell over a wide area.



Tomorrow, the 22nd (Monday), there will be a temporary winter-like atmospheric pressure pattern, and cold air will move southward mainly in northern Japan, causing rain and snow on the Sea of Japan side.
On the Pacific side, it will be sunny in many places, but in Kanto and Shizuoka prefectures, clouds tend to spread around the coasts, and there are likely to be some places where it will rain until morning.

Then, on the 23rd (Tuesday), high pressure will pass over Japan, so it will be sunny in many places.






On the 24th (Wednesday), a low pressure system and front will pass near Japan, causing bad weather across the country once again.
Due to the effects of low pressure and warm air blowing in from the front, there will be some places in Hokkaido where it will not snow, and there will be rain over a wide area on Christmas Eve.