How long will it last so much heat exceed your body temperature Beware of sudden changes in weather. The rainy season returns from the weekend, but it's getting hot and humid.

2025/06/18 13:55

Weekly Weather Forecast
#Rainy season break: How long will the extreme heat be exceeded Beware of sudden changes in weather
#Returns to the rainy season from the weekend The intense heat has subsided, but it's getting hot and humid



#Delivery during the rainy season How long will the heat exceed your body temperature Beware of sudden changes in weather
Today, the 18th (Wednesday), the Pacific High Pressure Power has increased, and the rainy season front is unclear.
In northern Kyushu, Chugoku, and Kinki to northern Tohoku, the strong sunlight shines like the rainy season has ended, and some places are already midsummer day in the morning.
In the afternoon, the maximum temperature is expected to be 37 C in Nagoya, Gifu, and Kofu, and is expected to be extremely hot and dangerously hot, exceeding your body temperature.
Please keep hydrated indoors and take measures against heat stroke, such as using an air conditioner.
Since the elderly and small children are sensitive to heat, please be proactive in encouraging them to stay hydrated.
From the evening onwards, the air condition will become unstable due to the cold air above you moving towards the Sea of Japan, the temperature rise during the day, and the humid air in the summer.
Even if it's sunny, you need to be careful of sudden heavy rain and thunderstorms, mainly inland areas and along mountains.


The rainy season will continue tomorrow, the 19th (Thursday), and there will be some places where it will be a very sunny and extremely hot day.



The highest temperature in Kyoto, Nagoya and Gifu is expected to be 36 C, and there are some areas where the temperature is dangerously high that exceeds the body temperature every day.
Also, as cold air above passes through northern Japan, the air condition will become unstable from the evening onwards, so be careful of sudden changes in the weather.

Tomorrow, the area around Japan will be covered by high pressure, and warm air will flow for this time of year.
The summer sun will shine brightly and it is expected to be a midsummer day over a wide area.
Tomorrow, the 20th (Friday) will reduce the number of dangerous hot spots that exceed body temperature, but there will be some extremely hot days.





#Returns to the rainy season from the weekend The intense heat is eased, but it is getting hot and humid
From around the weekend, the rainy season front is expected to move from the Sea of Japan to the area around northern Japan.
After that, the rainy season front will move south or north from the Sea of Japan around northern Japan until mid-week.
The weather is widely covered in clouds and unclear, and there are many areas where rain will fall, mainly in the west to the Sea of Japan side of the Japan Sea and north of Japan.
The rainy season has returned, and the number of hot days with a maximum temperature of over 35 C will decrease, but for this time of year with a maximum temperature of over 30 C, the temperature will continue to be high.
The humid and crunchy heat will continue, so please continue to be careful of heat stroke.

The rainy season begins from northern Kyushu to Tohoku, and in Okinawa the rainy season has ended more than 10 days earlier than usual. Summary of weather and temperatures (June 8th to June 14th, 2025)

2025/06/18 06:00

During this period (June 8th to June 14th), the rainy season has been announced from northern Kyushu to Tohoku, and by this period, the rainy season has been announced in all regions.
On the other hand, on June 8th, the end of the rainy season was announced in Okinawa more than 10 days earlier than usual, and, along with 2015, the earliest rainy season ended in statistical history.

This is a summary of the weather during this period (June 8th to June 14th).

#Summary of weather for this period (June 8th to June 14th)
The average temperatures were higher in Hokkaido and northern Tohoku, where there were many sunny days, and the Pacific side was much higher than normal. In Okinawa, the temperature was almost 3 degrees higher than normal in Naha because the Pacific High Pressure was often covered by the Pacific High Pressure. Many areas around northern Kyushu and Kanto, where the rainy season fronts were cloudy and rainy days were constantly cloudy.

Precency was high from Kyushu to Kanto, which was affected by the rainy season front, and in many places, the rainfall amounted to about 3 to 5 times more than normal from Kyushu to Tokai. In Kagoshima, where a linear precipitation zone occurred, the amount of rainfall recorded about three times that of the average year.

Sunday hours were high in Hokkaido, where there were many sunny days, the Pacific side of the northeastern Tohoku, and Okinawa, where the rainy season was announced, and Sakishima Islands. From Kyushu to Kanto, the days were cloudy and rainy due to the rainy season front, so sunlight hours remained much lower than normal.



#Characteristics of atmospheric pressure layout
On the 8th, the rainy season front ran from the east of Japan through Kyushu and into Hanachu. On the East Sea of the Philippines, the low-pressure area slowly moved westward. On the 9th, the rainy season front continued to stagnate in the east and west directions throughout Japan's East China. On the 10th, the rainy season front stagnated from western Japan to eastern Japan, and a low pressure system with strong cold air above it flew east through the Sea of Japan from the Korean Peninsula. On the 11th, the rainy season front continued to stagnate from western Japan to eastern Japan. Typhoon No. 1 appears in the South China Sea. Typhoon No. 1 was the fifth-latest occurrence ever since statistics began. On the 12th, a high pressure system advanced through the Sea of Japan, and the rainy season front moved a little further south than the previous day. A tropical cyclone emerged in the East Sea of the Philippines. On the 13th, the area around Honshu was covered by high pressure, and the rainy season front was directed far east from the East China Sea through Kyushu and south of Shikoku, leading to Japan's far east. On the morning of the 14th, kink on the rainy season front began to form a new low pressure system near the Korean Peninsula, causing the rainy season front to be obscure. The low pressure system proceeded northeasterly through the Sea of Japan with a front, and the Pacific high pressure system stagnated in the south of Japan.

#Precture
On the 8th, heavy rain in southern Kyushu near the front line. Rainfall of 49.0mm was observed for an hour on Yakushima. The rainy season began in northern Kyushu and Shikoku, and in Okinawa it was announced that the rainy season would end on the 13th, earlier than usual, and the 12th earlier than last year. On the 9th, a linear precipitation zone occurred in Kagoshima Prefecture. Record heavy rainfall in Ibusuki City, Kagoshima Prefecture is 345.5mm daily rainfall. The rainy season has begun in Chugoku, Kinki and Tokai. On the 10th, heavy rain began, mainly in western Japan due to the influence of the rainy season front. The rainy season begins in Hokuriku and Kanto. On the 11th, due to the rainy season front, extremely heavy rain was observed in the Shikoku region, including 62.0mm/h in Aki City, Kochi Prefecture and 57.5mm/h Hiwasa, Mihama Town, Tokushima Prefecture. In Ibusuki City, Kagoshima Prefecture, the precipitation amounted to 514.0mm for 72 hours. On the 12th, the rainy season front increased the rain, mainly in western Japan, with heavy rain in Nishikai City, Nagasaki Prefecture and Omuta City, Fukuoka Prefecture. On the 13th, rainfall increased in Kyushu, Chugoku, Shikoku, and other places near the rainy season front. In the Sakishima Islands, heavy rain was hit by Yonaguni Island due to the effects of tropical cyclones. On the 14th, heavy rain occurred in Shikoku due to the effects of low pressure and warm, humid air heading towards the front. The rainy season begins in the northern and southern parts of Tohoku.

#Temperature
On the 8th, clouds spread from Kanto to west due to the rainy season front, and in southern Kyushu, the temperatures dropped significantly from the previous day due to the increased rainfall. On the 9th, there were many places with temperatures lower than the previous day, from western Japan to eastern Japan's Pacific side. In northern Japan, the temperature was higher than normal, and in Sapporo, 29.4 C was observed. On the 10th, temperatures were low in western and eastern Japan due to the rainy season front, and temperatures were higher than normal in Hokkaido to northern Tohoku. On the 11th, temperatures in western and eastern Japan fell due to the rainy season front, with the highest temperature in central Tokyo at 23.1 C, similar to mid-May. Many of the Nansei Islands have midsummer days, and many of the temperatures have recorded the highest temperature this year. On the 12th, the temperature dropped on the Sea of Japan side from northern Japan to Hokuriku due to the effects of cold air from the sea. On the 13th, temperatures were high in southern Kyushu and Okinawa, on the south side of the front line, and Maeda, a liver genus in Kagoshima Prefecture, recorded a temperature of 34.3 C. On the 14th, temperatures in western and eastern Japan did not rise much due to rain. The sun was in northern Japan, with a summer day of 28.7 C in Asahikawa and 26.9 C in Sapporo.

Record of extreme heat at 65 locations dangerous heat continues tomorrow the 18th

2025/06/17 20:46

Today, the 17th (Tuesday), the area around Honshu was covered by high pressure, and warm air, which is above 21 C, flowed into the air about 1,500m above eastern Japan. Additionally, due to the strong sunlight approaching the summer solstice, temperatures rose early in the morning, causing record-breaking heat in Kanto, Koshin and Tokai.



In Kofu City, Yamanashi Prefecture, 38.2 C was observed, making it the hottest point in the country. In addition, the highest temperatures in the top 10 locations were above 37 C, with 37.7 C in Kamisatomi, Gunma Prefecture and 37.6 C in Shizuoka, making it dangerous heat.
In major cities, the temperature reached 34.7 C in Sendai, 34.8 C in central Tokyo, and 35.4 C in Nagoya, making it a very hot day.
Until 6pm today, the 17th, the number of observation points on midsummer days exceeding 30 C, and the number of observation points on extremely hot days exceeding 65.

#Maximum temperature in major cities
Sapporo: 28.1c (over the hottest season)
*Sendai: 34.7c (over the hottest season)
*Tokyo: 34.8c (over the hottest season)
*Nagoya: 35.4c (over the hottest season)
*Osaka: 33.4c (regular to late July)
*Fukuoka: 33.4c (regular to mid-July)
*Naha: 32.1c (regular to mid-July)
*: Highest temperatures this year




Tomorrow, the 18th (Wednesday), the Pacific high pressure forces around Honshu are still strong, and it is expected to be covered in warm air from the south. The highest temperature forecast for tomorrow is 37 C in Nagoya and Gifu, 36 C in Kyoto and Nara, and there are also some forecasts for extreme hot days in Tohoku, and 35 C in Fukushima and Yamagata. In Tokai, Kinki and Kyushu, heat stroke warning alerts have been issued, and heat indexes are high, especially in western and eastern Japan, and the heat index can be dangerous.



Please try to stay hydrated and salty. If you are spending time outdoors, take a reasonable break, and even if you are spending time indoors, use air conditioning to prevent heat stroke.

[The earliest hottest day in history] It will be over 37 degrees Celsius from 10am, and it will be even hotter tomorrow, so be careful of heat stroke!

2025/06/17 11:28

Today, Tuesday, June 17th, the area around Honshu is set to the south with a high pressure system and a low pressure system in the north with a low pressure system
South and North and Low.

The pressure arrangement of "South High North Low" is a pattern in which warm air flows from the south towards the low pressure in the north.



The highest temperature until 11am today is
: 37.7c
: Shizuoka City, Takasaki City, Gunma Prefecture: 36.4c
: Fuchu City, Tokyo: 35.8c
: Ushiku City, Chiba Prefecture: 35.7c
: Ebina City, Kanagawa Prefecture: 35.3c
: Kuwana City, Mie Prefecture: 35.3c
: Hachioji City, Tokyo: 35.2c
: Nerima Ward, Tokyo: 35.2c
: Maebashi City, Gunma Prefecture: 35.2c
: 35.2c
: Maebashi City, Gunma Prefecture: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2c
: 35.2


/B also, in Ushiku City, Chiba Prefecture, Ebina City, Kanagawa Prefecture, and Hachioji City, Tokyo
/B, it is the earliest hottest day in statistical history.




Pressure arrangement continues tomorrow, the 18th, with the north and north (low) continuing, and
Choice is expected to continue to remain high.

The expected maximum temperature for tomorrow will be 37c in Nagoya and Gifu, 36c in Kyoto and Nara, and 35c in Fukushima, Fukui, Takamatsu, etc.
The temperature will be even higher for tomorrow.

The temperature will be less likely to drop at night, and from tonight onwards there will likely be many tropical nights.

/be careful not only during the day but also during the night heat stroke.




In addition to hydrating frequently,
Use an air conditioner properly, and use a hat or parasol outdoors,
Please choose the shade and walk in so that it is not exposed to direct sunlight.


Four foods with a balanced nutrition and drink a glass of water at night before going to sleep is also effective in preventing heatstroke.


As elderly and infants are even more likely to suffer from heat stroke,
Please also ask people around you to talk to each other.

Temperatures rise in various places: inland Kanto, some areas approaching 40 degrees

2025/06/17 08:07

In Hokkaido and western Japan, rain will fall mainly in the morning due to the effects of fronts and humid air, but it is expected to gradually recover in the afternoon, with temperatures likely to rise in various places.

Today, the 17th (Tuesday), the Pacific High Pressure will strengthen its strength, and there are some areas where it will be extremely hot, with the Kanto and Tokai region exceeding 35 degrees.
Could temperatures near 40 degrees be near inland areas, especially in the Kanto region, and if it becomes a hot day in Tokyo too, it could potentially break the record (June 22, 2022).



Heat stroke alerts have also been issued in Chiba, Ibaraki, Wakayama, and Kagoshima prefectures.
Today, please stop exercising outdoors and take frequent breaks, drink water, and drink salt.
Also, please make sure to stay in a cool environment with an air conditioner or similar.



On the other hand, the atmosphere conditions in the Kanto region are unstable in the afternoon, with the probability of
lightning increasing, especially in the north. Be careful of sudden rain with lightning or severe gusts of winds such as tornadoes.






























































/

Former Typhoon No. 1 approaches Japan, even on extremely hot days this week, the temperature is quite high every day, and it's humid and humid.

2025/06/16 13:17

#Former Typhoon No. 1: Incorporated into the rainy season front and approaches Japan
#Not the end of the rainy season, it's not the end of the rainy season, but the rainy season is closed, beware of sudden changes
#Pacific high pressure forces are increasing Even on extremely hot days, even hotter and hot



#Former Typhoon No. 1: Incorporated into the rainy season front and approach Japan
Today, the 16th (Monday), the rainy season front extends from the continent to the East China Sea, and the low pressure from former Typhoon No. 1 was Incorporated into the rainy season front and is moving northeasterly through the East China Sea on the front.
Until tonight, the low pressure system of former Typhoon No. 1 is expected to change shape and move to western Japan.
In western Japan, warm and humid air will flow towards the front, making the atmosphere extremely unstable.
There is a risk of heavy rain, with local lightning, especially in Kyushu.
Please be careful and be careful of landslides, flooding of low land, flooding of rivers and flooding.





#The rainy season is closed rather than the end of the rainy season. Beware of sudden changes in weather
The Pacific high pressure forces will increase in the middle of the week, and activities on the rainy season front are expected to weaken.
The rainy season front will be unclear, and the strong sunlight will shine through Kyushu to Tohoku, just like the rainy season has ended.
However, due to the effects of warming during the day and humid summer air, the atmosphere becomes unstable, and even if it is sunny, you need to be careful of sudden heavy rain and thunderstorms.
From around the weekend, the front will move from the Sea of Japan to the area near northern Japan, and the weather will be covered in wide clouds, causing uneven weather.
It is expected that there will be some areas where rain will fall, mainly in the West to East Japan Sea of Japan side and north Japan.



#Pacific high pressure forces are increasing Even on extremely hot days, it's even more humid
This week, the Pacific high pressure forces that bring about the summer heat will increase, so the area around Japan will be covered in warm mid-summer air.
Temperatures are high nationwide, and it is expected that the days around Honshu will continue to last considerably higher than normal.
There may be some hot days with a maximum temperature of 35 C or higher.
The estimated maximum temperature for the 18th (Wednesday) in central Tokyo is 34 C, but if the temperature rises more than expected and it becomes a hot day, it is likely to be the earliest record of the hottest day ever recorded.
The extreme heat during the rainy season is extremely humid and humid, so it can be dangerous.
Please be sure to take full precautions against heatstroke.

Temperatures rising nationwide; Kagawa and Wakayama announced their first heatstroke warning alert for the year

2025/06/16 06:26

Yesterday, the 15th (Sunday), the temperature rose, mainly in western Japan, and the number of midsummer spots exceeded 200, the first time since May 21st.


Today, the 16th (Monday), the area around Japan will be covered in warm air, so temperatures will rise nationwide.
The forecast maximum temperatures are 26c in Sapporo, 26c in Sendai, 29c in Tokyo, 33c in Nagoya, 33c in Osaka, 31c in Fukuoka, and are still forecast to be higher than normal.
Even in western Japan, the temperatures are rising, and it seems to be humid and humid during the day. Care must be taken as it increases the risk of heat stroke.
Also, due to the Fohn phenomenon occurring due to the south wind, it is expected that more temperatures will rise in the Sea of Japan side than the previous day.
We expect Kanazawa to have a 33 C 7 C higher than the previous day, and Kyoto to have a 33 C 6 C higher than the previous day. Be sure to stay hydrated and salty in a way that will prevent you from getting sick from the heat.



The Ministry of the Environment and the Japan Meteorological Agency have issued heatstroke warning alerts to the Yaeyama region of Okinawa, the Amami region of Kagoshima Prefecture, Kagawa Prefecture and Wakayama Prefecture, making this the first announcement this year in the Amami region of Kagoshima Prefecture, Kagawa Prefecture, and Wakayama Prefecture.


In areas where a heatstroke warning alert has been issued, significantly higher temperatures can cause damage to human health due to heatstroke.
Please refrain from activities during hot weather and try to take frequent breaks, drink water, and drink salt.
Also, use air conditioners indoors to make sure you live in a cool environment and take full advantage of heat stroke prevention indoors.

Weather today, Monday the 16th: Beware of heavy rain in Kyushu; the Kanto region may be arrested

2025/06/16 06:12

Today, the 16th (Monday), low pressure and fronts are expected to travel through the Sea of Japan and the East China Sea. It is likely that rain will fall, mainly on the Sea of Japan side of western Japan, and it is likely that umbrellas will be used in northern Japan as well.



Although there is a time for the sun to reach Northern Japan, the weather is expected to go downhill in the afternoon. It started raining around the evening, and the rainy area would likely expand later in the night. It's a good idea to carry a folding umbrella even if it's not raining when you're out.


Clouds spread in eastern Japan, but there are many places where it is sunny. In the afternoon, there are some showers inland and along the mountains, so be careful of changes in the sky. There are areas where showers are found in Hokuriku, so it's safe to have a folding umbrella ready.

Clouds are likely to spread in Kinki, Chugoku and Shikoku, and it is expected that there will be some time for rain after the evening. It's a good idea to bring rain gear when you're out.


Weather in Kyushu is likely to rain easily throughout the day. As rain clouds develop, there is a risk of heavy rain or thunderstorms, beware and beware of landslides, flooding of low land, rising rivers and flooding.

[Northern Kyushu] Continuing to be careful and wary of atmospheric instability, landslides, flooding of low land, flooding of rivers and flooding.

2025/06/15 17:06

There is a low pressure system off the coast of Akita and it travels northeast.
The front extending from the low pressure system is passing through East and Western Japan.


Warm and humid air flows towards the front and low pressure, causing the atmosphere to remain unstable.
In Kyushu, there are raining everywhere, and there are some areas where it rains heavily with thunder.




Also, by tomorrow morning the 16th, the low pressure system that will occur in the Sea of Japan will progress to the northeast, and the cold front will extend to the northern Kyushu region.
In the northern Kyushu region, even up until tomorrow, warm and humid air will flow towards the low pressure and the front, making the atmosphere extremely unstable.

For this reason, heavy localized rain will fall intermittently into the early hours of the 16th, leading to heavy rain.
If the rain clouds develop more than expected, they may issue heavy rain warnings or flood warnings.
There is also a risk of severe gusts of wind such as lightning strikes or tornadoes.


In the northern Kyushu region, beware and beware of landslides, low-lying flooding of landslides, river flooding and flooding through the 16th.
Also be careful of severe gusts of wind, such as lightning strikes and tornadoes.



[Rain forecast]
The expected one-hour precipitation from the 15th to the 16th is high,
Fukuoka Prefecture 30mm
Saga Prefecture 30mm
Nagasaki Prefecture 30mm
Oita Prefecture 30mm

Kumamoto Prefecture 40mm




/ The expected 24-hour precipitation from the 15th to 6pm on the 16th is high,
Fukuoka Prefecture 100mm

/ Saga Prefecture 100mm
/ Nagasaki Prefecture 100mm
/ Oita Prefecture 100mm
/ Kumamoto Prefecture 120mm

/ [Disaster Prevention]
Please be careful and be careful of landslides, flooding of low lands, flooding of rivers and flooding.
Beware of severe gusts of wind, such as lightning strikes and tornadoes.
If there are signs of developing cumulonimbus clouds approaching, try to ensure safety by moving inside the building. "

Weekly forecast: Will the heat of midsummer heat keep on getting hot Be careful of heat stroke

2025/06/15 08:02

From now on, there will be many places that will be midsummer heat from tomorrow, the 16th (Monday). In particular, in eastern and western Japan, temperatures reach 30 C or higher every day, and there may be many places where the temperature is extremely hot above 35 C or higher.


If we look at the pressure arrangements ahead, the area around Honshu will be widely covered by the Pacific High Pressure on Sunday the 22nd, and the pressure arrangement will be as if the rainy season has ended. Due to the effects of the Pacific High Pressure, warm air will flow into the area around Honshu, making it a severe heat that is expected to be like midsummer.

From the 17th to the 19th, many hot days are expected to appear, mainly in the Kanto, Koshin and Tokai regions. The estimated highest temperature in central Tokyo is expected to be 34 C on Tuesday the 17th and Wednesday the 18th, but the temperature will be higher than expected, and it is likely that this will be the first hot day of the year. In Nagoya, it is expected that the hottest days will be on Wednesday the 18th and Thursday the 19th.
In western Japan, the temperature is expected to remain around 31-32 C every day, and there will be some hot days inland and above 35 C.




This is still a time of year when the summer heat is still unfamiliar, so the risk of heat stroke is very high. Make sure to drink plenty of water and take moderate breaks. Even if you are staying indoors, don't hold back from the heat and use air conditioning.