Western Japan: The extreme heat and tropical nights have already been happening every day, and the atmosphere is unstable in the Kanto region, and be careful of sudden, severe thunderstorms. When will the rainy season end

2025/06/30 13:15

Weekly Weather Forecast
#Western Japan The rainy season has ended in the history of statistics. The extreme heat and tropical nights have already come out every day. Eastern Japan, including Kanto, atmospheric instability. Beware of sudden, severe thunderstorms
#Rain in northern Japan on weekends
#When will the rainy season end in eastern Japan and Tohoku



#Western Japan The rainy season has ended in statistical history The heat has already ended every day and tropical nights
The other day, on Friday, June 27th, it was announced that the rainy season has ended in western Japan about three weeks earlier than usual.
The rainy season has ended in northern Kyushu, Shikoku, Chugoku, and Kinki, the earliest since statistics began.
July will start tomorrow, the 1st (Tuesday).
Now, the tall high pressure system is expected to slowly move its center west.
Western Japan will be covered in high pressure and sunny weather, with the summer sun shining brightly.
There are some days when it's extremely hot every day, and Tanabata Day on Monday the 7th will likely be a dangerous heat in Kyoto with a maximum temperature of 37 C.
Also, some places are expected to be tropical nights with a minimum temperature of 25 C or higher, so it is likely that nights that are difficult to sleep in will soon arrive.
Because the rainy season ended early, it looks like it will be a hot and tropical night every day since July starts.
Please take full precautions against heatstroke more than usual.





#East Japan, including Kanto, atmospheric instability Beware of sudden, severe thunderstorms
Tall high pressure systems overhang near western Japan, and many days when warm, humid air around the edge of the high pressure systems flows into eastern and northern Japan.
Clicking will likely spread in eastern and northern Japan from now on.
It is expected that the day when sunlight reaches through the gaps between the clouds will be extremely hot, especially in eastern Japan.
Also, due to the warm, humid air surrounding the edge of the high pressure system, the temperature rise during the day, and the cold air above, the air condition will be unstable in the afternoon, mainly in the eastern Japan, around Thursday the 3rd.
Beware of sudden, heavy rain, lightning, and gusts of wind that are locally accompanied by lightning.
If the rain clouds stagnate, there is a risk of heavy rain at the level of an alarm.



#Rain in northern Japan on weekends
From Saturday the 5th to Sunday the 6th, a low pressure system is expected to progress to the Sea of Okhotsk.
There will be some areas where rain will fall in northern Japan, mainly in Hokkaido.
Even in northern Japan, temperatures tend to be higher than normal on cloudy and rainy days, and some are expected to be midsummer days.

#When will the rainy season end in eastern Japan and Tohoku
The rainy season front is expected to not stagnate near Honshu in the future.
However, the high pressure system in the summer spreads around western Japan, so the weather is unclear in eastern Japan and Tohoku.
It seems there is no announcement about the end of this week's rainy season.

Atmospheric conditions are unstable, especially in western and eastern Japan. Be careful of sudden changes in the weather in the afternoon.

2025/06/30 08:04

Today, the 30th (Monday), western and eastern Japan will be covered by high pressure, but moist air from the south, around the edge of the high pressure system, is likely to enter, and as temperatures rise during the day, the atmosphere will become unstable, and rain clouds will likely emerge, especially around mountains and inland areas.



If you look at the lightning probability forecast today at 6pm, you will see areas with high probability distribution, mainly along mountains in western Japan and eastern Japan, and inland. Rain clouds and thunder clouds will likely develop in the afternoon, and there is a high possibility of sudden rain or thunderstorms along mountains in western and eastern Japan, as well as inland areas. Please be careful of sudden changes in the weather today as there is a possibility of heavy rains of 30-50 mm per hour.



Please be careful of sudden changes in the weather, mainly in the afternoon, tomorrow, the 1st (Tuesday). Looking at the prediction of lightning probability at 6pm tomorrow, the 1st, it is expected that the area will be high in western and eastern Japan, and more than 90% will expand, especially in the Kanto-Koshin region.
Beware of changes in the sky not only occurring sudden rain or thunderstorms that fall in a short period of time, but also gusts of wind such as lightning strikes and tornadoes.

Heat stroke warning alerts announced in 17 prefectures, the most common this year; risks dangers of exceeding body temperature

2025/06/30 07:34

Today, the 30th (Monday), the area around Honshu will be covered by high pressure, and the sunny weather will likely be shining in the west and eastern Japan. There will be areas where temperatures exceed 30 C from early in the morning, and some areas will likely be extremely hot in the afternoon, with temperatures above 35 C.
The estimated maximum temperature during the day today, the 30th will be above 30 C from Tohoku to Kyushu, and in Kurume City, Fukuoka Prefecture, it is expected to rise to 37 C, which could lead to a dangerous heat that exceeds body temperature. The temperature is expected to be 36 C for Maebashi, Kumagaya, Nagoya, Kyoto, etc., and the temperature is 35 C for Fukushima, Kofu, Nara, etc. The temperature is expected to be 33 C in central Tokyo and 34 C in Osaka, so the heat will be midsummer.



The Ministry of the Environment has issued a heatstroke warning alert, mainly in western Japan. The number of areas to be announced this year is 17 prefectures, with today the highest risk of heatstroke being even higher.


Be sure to stay hydrated and salted frequently to avoid heat stroke. Be sure to stay hydrated and take reasonable breaks before you get thirsty.
Also, even in areas where heatstroke warning alerts have not been issued, we ask that you implement as much heatstroke prevention as possible, such as using air conditioning, day and night.

It's also been severe today (many records for June's highest temperatures)

2025/06/29 15:54

Today, the area around Japan was covered with high pressure, and the country was sunny and it was extremely hot.
There were many places, especially in the west and eastern Japan, where summer days were over 30 C, and many places were over 35 C. As of 3pm, there were 550 midsummer days with a temperature of 30 C or higher all over the country, and 38 hot days with a temperature of 35 C or higher. The number of points exceeded yesterday, when it was hot.
Also, the highest temperature in June was the highest ever recorded at 29 locations nationwide, and the highest temperature in Thailand at 7 locations.




Tomorrow, the end of the week, will be within the high pressure zone, with the sunny weather continuing to be sunny, especially in the west and eastern Japan.
In the afternoon, there may be some areas where showers and thunderstorms will occur, mainly along the mountains, so please be careful about your health, such as heat stroke.
Please be careful of sudden rain.




Also, for the following week, the weather is expected to continue to clear, mainly in western Japan, with hot weather conditions in various places.
In addition to health management such as preventing heat stroke, please be careful about managing agricultural products, livestock, etc.

Beware of severe heat and sudden thunderstorms

2025/06/29 07:16

The area around Honshu is covered with high pressure.

Today (29th), the area around Japan will be covered by high pressure, and it is expected to be sunny over a wide area, with a midsummer day at
136 points, and a super hot day at 16 points. In addition, the Ministry of the Environment and the Japan Meteorological Agency have issued heat stroke warning alerts to 12 prefectures, including Shimane, Kochi, and Fukuoka. In particular, in Kurume, Fukuoka Prefecture, the temperature is expected to be 37 C, and temperatures are expected to exceed
body temperature. Please take full precautions against heat stroke.



In addition, the chances of lightning occurring in the afternoon are higher, especially along mountains in western and eastern Japan. You should be careful of sudden rain and thunderstorms.



Tomorrow (Sunday 30th) is expected to continue to be high temperatures, with more
points to be a hotter day than today.
Please try to stay in a cool environment using an air conditioner indoors, etc., and try to drink plenty of hydration and
.
Also, the chances of lightning occurring will be higher tomorrow afternoon. Please be careful of sudden rain or thunderstorms.

The severe heat breaks record for June's highest temperatures at 17 locations nationwide (as of 3pm)

2025/06/28 17:43

The Sea of Japan has a high pressure system and is moving eastward.
Also, there is a high pressure system in the East China Sea, and it is almost stagnant.

Today, the area around Japan was covered with high pressure, and the country was sunny and it was extremely hot.
There were many places, especially in the west and eastern Japan, and there were some places that were extremely hot days with temperatures of 35 C or higher.

As of 3pm, there were 166 midsummer days with a temperature of 30 C or higher, and 18 hot days with a temperature of 35 C or higher nationwide.
Also, the highest temperature in June was the highest ever recorded at 17 locations nationwide, and the highest temperature in Thailand at two locations.






Tomorrow, it will be within the high pressure range and the heat will continue to be sunny all over the country. In the afternoon, there may be some areas where showers and thunderstorms are likely to occur, mainly along the mountains, so please be careful about your health, such as heat stroke.
Please be careful of sudden rain.




Please note that high temperatures are expected to continue in various regions, mainly in western Japan, for the next week.
In addition to health management such as preventing heat stroke, please be careful about managing agricultural products, livestock, etc.

Heat stroke warning broadly, mainly in Eastern and Western Japan; Hiroshima announces daily heat stroke warning alerts

2025/06/28 06:29

Today, the 28th (Saturday), the sun will be exposed to high pressure and reaching the country.
Temperatures are rising, mainly in western and eastern Japan, and today it seems that heatstroke prevention will continue to be an essential day.


The forecast maximum temperatures are 26c in Sapporo, 34c in Sendai, 35c in Tokyo, 35c in Nagoya, 35c in Osaka, 33c in Kochi, and 31c in Fukuoka.
From southern Tohoku to western Japan, it is expected to be midsummer days with a maximum temperature of 30 C or higher in many regions. Inland areas, the weather is expected to be extremely hot in the temperature exceeding 35 C, and in Kumagaya and Kofu, the temperature is likely to be dangerously high at 36 C, which is higher than the temperature.
We are also expecting a hot day at a high of 35 C in central Tokyo, and it is expected to be the first hot day of the year.



The Ministry of the Environment and the Japan Meteorological Agency have issued heatstroke warning alerts to Hiroshima, Kumamoto, Kagoshima (excluding Amami), Okinawa (the main island region) and (Yaeyama region). Hiroshima has made an announcement every day, following yesterday (27th).


In areas where a heatstroke warning alert has been issued, significantly higher temperatures can cause damage to human health due to heatstroke.
There are probably many people who plan to go out on their days off, but please refrain from activities during hot times as much as possible, and try to take frequent breaks, drink water and salt.
Also, make sure to stay in a cool environment, such as using air conditioners indoors, and take full advantage of heatstroke prevention indoors.

Weather today, Saturday the 28th: ??The country is sunny and harsh, and be careful of sudden thunderstorms inland

2025/06/28 06:02

Today, the 28th (Saturday), the area around Japan will be covered by high pressure, so sunlight will reach the country. However, you need to be careful as there are some areas inland areas where showers will occur in the afternoon.



In Hokkaido, the weather is likely to improve and sunny. There are many places where the temperature is rising since yesterday (27th), so take measures against the heat.
Although clouds tend to spread in the morning on the Sea of Japan side of Tohoku and Hokuriku, the sun is likely to return in the afternoon.


It will be sunny from Kanto to western Japan. In some places, the summer days are over 30 C, and there may be some extremely hot days of over 35 C. Take full precautions against heat stroke.

In the afternoon, rain clouds will develop locally inland areas of eastern Japan and Kyushu, and there will be some places where showers and thunderstorms will occur. When you're out and about, be careful of changes in the sky pattern and have a folding umbrella to make it safe.

Southern Kyushu - Kinki: After the rainy season ends, be careful of extreme heat nationwide for at least a month

2025/06/27 11:54

Today, Friday, June 27th, the Japan Meteorological Agency announced that the rainy season is expected to have ended in southern Kyushu, northern Kyushu, Shikoku, Chugoku and Kinki regions.



Modern Year Compared to Last Year

South Kyushu 18th Early 19th Early
Northern Kyushu 22nd Early 20th Early
Shikoku 20th Early 20th Early
Chugoku 22nd Early 24th Early
Kinki 22nd Early 21st Early

The rainy season ended about three weeks earlier than usual.

/Please note that the information announced today about the end of the rainy season is a preliminary figure.
Later, we will check the actual weather conditions from spring to summer and confirm the time for the rainy season to begin again and the end of the rainy season. (Definite value)

If the rainy season is confirmed to end in June, the rainy season will be the second-early end in southern Kyushu, and
This will be the first time in other regions in statistical history.




We are expected to continue to be easily covered by high pressure systems, and there will be many sunny days, especially in western Japan.
It looks like there will be more hot days in western Japan to come up next week.
In eastern and northern Japan, the rainy season will return again next week, but the temperature is expected to continue to be hot.


The high temperatures are expected to continue for about a month in the future. Be careful about health management, such as managing crops and livestock, and preventing heat stroke.

Weekly weather: Is the rainy season nearing the end of the Honshu region The heat continues during the summer

2025/06/27 08:03

From now on, the Pacific High Pressure will prevail around Honshu, and the weather is expected to continue with clear weather, especially in western Japan. The rainy season front is expected to be unclear near Honshu, and the weather is expected to continue to be sunny in western Japan for more than a week. As early as possible, it is likely that the rainy season will end earlier than usual near Honshu.




In western Japan, the heat will continue to be as severe as the real summer, with many days of extreme heat above 35 C. Looking at the expected maximum temperatures ahead, it seems that the days will continue to be around 33 C, and there will be some tropical nights where the temperature does not drop much at night. Take ample measures such as drinking plenty of water and taking moderate breaks to avoid heat stroke.

/BOn the other hand, although there are some sunny days in northern and eastern Japan, there are many days that are affected by valleys of atmospheric pressure and humid air. Unstable weather is likely to continue, and even if the weather forecast does not have an umbrella mark, there are likely some places where showers and thunderstorms will occur. Furthermore, due to the expected high temperatures during the day, rain clouds and thunder clouds are likely to develop locally, and there is a possibility that heavy rain or thunderstorms that fall in a short period of time, such as "guerilla thunderstorms." Be careful of sudden changes in the heat and weather from here onwards.