The lingering heat continues to be severe from the Tokai region to the west, so be careful of heatstroke

2026/08/31 06:48

Today, the 31st, will be the last day of August, and high pressure will continue to cover western and eastern Japan, allowing sunlight to reach a wide area from the morning. Continuing from the previous day, the weather is expected to be sunny from the Tokai region to western Japan, with temperatures rising during the day, leading to extremely hot days with maximum temperatures of 35 C or higher and a severe lingering heat.
Today's highest temperature is expected to be in Nara, reaching 38 degrees Celsius, a dangerously hot temperature exceeding body temperature. In other regions, the heat can be as hot as body temperature, so you need to be careful about heat stroke.

On the other hand, the temperature in northern Japan does not rise much, making it a relatively pleasant experience.
In the Kanto region, clouds will spread and there will be no places where it will be extremely hot, but it will be a hot and humid day. It would be a good idea to choose clothes that are breathable.

The predicted maximum temperature in each region is Sapporo 24c, Sendai 26c, Tokyo 29c, Kanazawa 34c, Nagoya 36c, Osaka 36c, Kochi 34c, and Fukuoka 35c.



The Ministry of the Environment and the Japan Meteorological Agency have issued heatstroke warning alerts from western Japan to the Tokai region, covering 26 prefectures.

#Area covered by heat stroke warning alert
Shizuoka, Aichi, Mie, Fukui, Shiga, Kyoto, Osaka, Hyogo, Nara, Wakayama, Okayama, Hiroshima, Shimane, Tottori, Tokushima, Kagawa, Ehime, Kochi, Yamaguchi, Fukuoka , Oita Prefecture, Nagasaki Prefecture, Saga Prefecture, Kumamoto Prefecture, Miyazaki Prefecture, Kagoshima (excluding the Amami region)

In areas where a heatstroke warning has been issued, there is a risk of damage to human health due to heatstroke due to extremely high temperatures.
Please refrain from activities during hot hours as much as possible, and be conscious of taking frequent breaks and replenishing hydration and salt intake.
Also, try to stay indoors in a cool environment by using an air conditioner, and take precautions against heatstroke indoors.

Weather for today, the 31st (Monday): Sunny mainly in western Japan, with clouds predominant in northern Japan and the Kanto region

2026/08/31 06:16

Frontal activity is expected to weaken on Monday, August 31st, the last day of August. The sky is likely to be cloudy in northern Japan. On the other hand, from the Tokai region to the west, it is expected to be sunny with strong sunlight.



The sky in northern Japan is prone to clouds due to the influence of humid air. It will be a sunny day in Hokkaido, but there is a chance of showers in Tohoku. It will be safe to have a folding umbrella when you go out.

Although there are some sunny days in the Kanto region, it is a cloudy day. Please be careful of sudden thunderstorms especially along the mountains.

Tokai, Hokuriku, and western Japan are sunny and the sun shines. The lingering heat will continue to be severe during the day, and many places will experience extreme heat. Please take proper measures to prevent heat stroke. In the afternoon, there are places where there will be sudden thunderstorms mainly along the mountains. Please also pay attention to changes in the sky.

In Okinawa, there are many places where the sun reaches at first, but the weather goes downhill towards night. It will start to rain at night, so if you will be returning late, please bring rain gear.

Weather forecast for tomorrow 31st (Monday): The last day of August will be extremely hot. Inland areas should be careful of sudden changes in weather from the afternoon.

2026/08/30 18:40

Tomorrow, the 31st (Monday), the activity of the autumn rain front will weaken near Honshu, and a wide area of western and eastern Japan is expected to be covered in high pressure.



The weather for tomorrow, the 31st (Thursday), will be sunny in many places, although there will be a lot of clouds during the day. However, the high pressure system in the south of Japan is strong, and many places are expected to experience even more intense heat than the previous day, the 30th (Sunday).



The expected maximum temperature is 38c in Nagoya, Gifu, and Nara, and 37c in Kyoto, Okayama, Saga, and Kumamoto. It is expected that there will be places, mainly in western Japan, where the heat will be dangerously high, exceeding body temperature.
Even in eastern and northern Japan, many places are expected to be hotter than the previous day on the 30th, so it's likely to be hot and humid. In Hokuriku, Fukui, which experienced record heavy rain on the 30th, is forecast to experience a hot day of 35 degrees Celsius.
To avoid heat stroke, please continue to prevent heat stroke by hydrating frequently, supplementing with salt, and taking adequate breaks.



Even in sunny areas, rain clouds are likely to develop locally in the afternoon, mainly inland and along mountains, due to rising temperatures and moist air. Pay attention to changes in the sky, such as sudden rain or thunderstorms.

In Okinawa, even if it starts out sunny, clouds will gradually spread due to the influence of the moist air from the tropical cyclone. The weather will turn downhill towards the end of the night, with rain expected in many places. In addition, waves are expected to gradually increase in coastal areas, so please be careful of high waves accompanied by strong winds and swells.

Autumn rain front stagnates near Honshu; record-breaking heavy rain never experienced in Fukui Prefecture

2026/08/30 11:51

Today, the 30th (Sunday), an autumn rain front is stationary near Honshu from the Sea of Japan to the sea east of Japan, and a low pressure system is moving through the Sea of Japan.
Very warm and humid air is flowing towards the front and low pressure system, making the atmospheric conditions extremely unstable.

In the vicinity of Hokuriku, rain clouds that repeatedly developed continued to pass yesterday on the 29th, causing heavy rain, and today, on the 30th (Sunday), a Level 5 heavy rain special warning was announced for Fukui City, Katsuyama City, and Ono City in Fukui Prefecture. (*At 11:40 a.m., the special warning was switched to a warning.)
Some areas in Fukui Prefecture are experiencing heavy rain that has never been experienced before. The 24-hour rainfall up to 10 a.m. today, the 30th (Sunday), was 346.5 mm in Katsuyama City, Fukui Prefecture, 312.5 mm in Miyama, Fukui City, and 30.5 mm in Harue, Sakai City, all of which were record heavy rains that broke the highest values in the history of observation since statistics began.
In Katsuyama City, nearly 1.8 times the amount of rainfall in a normal August fell in just over a day.
In Fukui Prefecture, there are areas where serious disasters such as flooding and river flooding have already occurred, mainly in areas where special warnings have been issued. Please take extreme precautions against flooding of low-lying land, rising water levels and flooding of rivers.



In addition, there are areas in Fukui Prefecture where level 4 landslide warnings have been issued, mainly in the northern part of Reihoku, and the situation is such that landslides could occur at any time. Although the rain is expected to ease into the afternoon, the record-breaking heavy rain has loosened the ground, so please be on guard against landslides even with a little rain.





From now on, the front will remain in the Sea of Japan until tonight, and there will be areas where rain clouds that have developed mainly on the Sea of Japan side will flow into the area.
From mid-afternoon to evening, rain is expected to spread across areas along the Sea of Japan in the Tohoku region and within Niigata Prefecture, with heavy rain expected to be accompanied by thunder in some places in Niigata Prefecture.
In the Tokai region and western Japan, atmospheric conditions are expected to become unstable due to rising daytime temperatures and warm, humid air moving towards the front, leading to localized heavy rain accompanied by thunder.
Be careful of landslides, flooding of low-lying areas, and sudden rises in river water, and be careful of lightning strikes, tornadoes, and other strong gusts of wind.

Today's weather on the 30th (Sunday): Tohoku and Hokuriku are on alert for heavy rain

2026/08/30 06:17

The autumn rain front is expected to stall from Hokuriku to the southern Tohoku region. Please be wary of heavy rain in Hokuriku and Tohoku. There are many clouds in the Kanto region, and there is a possibility of rain. In western Japan, where the sun shines, the temperature rises to around 35 degrees Celsius during the day, and people need to be careful about heatstroke.



It will be easy to rain in Hokuriku and Tohoku, where the autumn rain front is stationary. It is expected to rain heavily in some places until around noon. The rain will gradually weaken in the afternoon, but in Hokuriku, where the rain continues, we need to be careful of new disasters. In Hokuriku, the temperature is higher than yesterday, and it looks like it will be hot and humid. It will be a cloudy day in Hokkaido.
Western Japan receives more sunlight, but the atmospheric conditions are unstable, and you need to be careful of sudden thunderstorms in the afternoon. With the forecast for intense heat in many areas, it is essential to continue to take thorough measures to prevent heatstroke. There are many clouds and high humidity in the Tokai region, so it is likely to be uncomfortable and humid.
There will be a lot of clouds in the Kanto-Koshin region as well, and the sky will not be clear. There is a possibility of rain showers, so a folding umbrella is a good idea. During the day, the temperature will be higher than yesterday, and you will feel stuffy and uncomfortable.

National weekly weather from 8/30 to 9/5

2026/08/29 18:59

From tomorrow onwards, the autumn rain front will move northward, so we need to be careful about heavy rain, especially in Tohoku and Hokuriku. It will continue to be hot and humid in many places, and the harsh lingering heat will continue in areas where the sun can reach.



The autumn rain front will move northward tomorrow, the 30th (Sunday), and rain is expected mainly on the Sea of Japan side of Tohoku and Hokuriku. Particularly in the Tohoku and Hokuriku regions, the frontal activity will increase into the 31st (Monday), leading to heavy rain. On the other hand, on the Pacific side of western Japan and the Pacific side of eastern Japan, which are far from the front, the atmospheric conditions are unstable even with periods of sunshine, so be careful of sudden rain or thunderstorms in the afternoon.
A low pressure system will form on the front on the 1st (Tuesday), and northern Japan is expected to be affected by it. This low pressure system and front are likely to move south after passing through northern Japan, and there is a risk of heavy or heavy rain in northern and eastern Japan from the 2nd (Wednesday) to the 3rd (Thursday).
The areas of heavy rain will change depending on the position of the low pressure system and front, so please keep an eye on the latest information.
Although there are no forecasts for extremely hot days of 40 degrees Celsius or higher in the future, the uncomfortable humidity is expected to continue due to the flow of warm, humid air and the overhanging Pacific high pressure system. Particularly towards the middle of next week, extremely hot days are expected in areas west of the Tokai region where sunlight can reach easily, so even on cloudy or rainy days, please remember to take precautions against heatstroke, such as staying hydrated frequently.

National weekly weather from 8/30 to 9/5

2026/08/29 18:55

From tomorrow onwards, the autumn rain front will move northward, so we need to be careful about heavy rain, especially in Tohoku and Hokuriku. It will continue to be hot and humid in many places, and the harsh lingering heat will continue in areas where the sun can reach.



The autumn rain front will move northward tomorrow, the 30th (Sunday), and rain is expected mainly on the Sea of Japan side of Tohoku and Hokuriku. Particularly in the Tohoku and Hokuriku regions, the frontal activity will increase into the 31st (Monday), leading to heavy rain. On the other hand, on the Pacific side of western Japan and the Pacific side of eastern Japan, which are far from the front, the atmospheric conditions are unstable even with periods of sunshine, so be careful of sudden rain or thunderstorms in the afternoon.
A low pressure system will form on the front on the 1st (Tuesday), and northern Japan is expected to be affected by it. This low pressure system and front are likely to move south after passing through northern Japan, and there is a risk of heavy or heavy rain in northern and eastern Japan from the 2nd (Wednesday) to the 3rd (Thursday).
The areas of heavy rain will change depending on the position of the low pressure system and front, so please keep an eye on the latest information.
Although there are no forecasts for extremely hot days of 40 degrees Celsius or higher in the future, the uncomfortable humidity is expected to continue due to the flow of warm, humid air and the overhanging Pacific high pressure system. Particularly towards the middle of next week, extremely hot days are expected in areas west of the Tokai region where sunlight can reach easily, so even on cloudy or rainy days, please remember to take precautions against heatstroke, such as staying hydrated frequently.

Weather for tomorrow, the 30th (Sunday): Watch out for prolonged heavy rain in Hokuriku and Tohoku; unsatisfactory weather also on the Pacific side of eastern Japan and in the San-in area

2026/08/29 18:19

Tomorrow, the 30th (Sunday), the autumn rain front will stay from Hokuriku to the southern Tohoku region. There is a possibility of heavy rain in Hokuriku and Tohoku tomorrow evening, so please be careful. Atmospheric conditions are also expected to remain extremely unstable.



There is a risk of locally heavy rain in areas such as the Sea of Japan side of Tohoku, Hokuriku, and the Sanin area. In Ishikawa and Toyama prefectures, which experienced record heavy rainfall, caution and vigilance are still required to avoid landslides, flooding of low-lying areas, and rising river waters.

There are many clouds in the Kanto region, and there is a possibility of rain. The maximum temperature in Tokyo is expected to be 28 degrees Celsius, which is not expected to reach the height of midsummer, but it will be humid and humid.

In western Japan, where the sun shines, there are many places where the temperature will rise to around 35 degrees Celsius, making it an extremely hot day. Be sure to take all possible measures to prevent heat stroke, such as frequently replenishing fluids and salt. Also, be careful of sudden heavy rain, lightning, and gusts of wind in the afternoon.

Hokkaido and the Nansei Islands generally receive sunshine, but there are likely some places in the Sakishima Islands where it will rain.

Autumn rain front slowly moving north near Honshu; warning-level heavy rain is expected from Hokuriku to Tohoku

2026/08/29 13:01

The autumn rain front will continue to be active this afternoon, Saturday the 29th, and vigilance is needed for heavy rain, especially in Hokuriku and Tohoku. Moist air will continue to flow toward the front from the southwest, and rain clouds will likely develop.





In Hokuriku, there are places where the ground has become loose due to record-breaking heavy rains up until yesterday, the 28th (Friday), and even a little rain can easily cause landslides on cliffs and steep slopes.
It looks like there will be heavy rain with intermittent thunderstorms in some places tonight. With continued rain, the risk of not only landslides but also rising rivers and flooding of low-lying areas will increase.

The predicted 24-hour precipitation from 12:00 on the 29th to 12:00 on the 30th is expected to be high in some places:
Niigata Prefecture 60mm
Toyama Prefecture 100mm
Ishikawa Prefecture 100mm
Fukui Prefecture 100mm

.
If the rain gets heavier or you feel something strange, please try to evacuate to a safe place as soon as possible.




It will be cloudy and rainy from the Kinki region to the Chugoku region, and there is a risk of locally extremely heavy rain, especially in the Sanin region and northern Kinki region. The amount of rainfall will increase in a short period of time, and there is a possibility that it will become a warning-level heavy rain.
There is also a risk of lightning strikes, tornadoes, and strong gusts of wind.
If there are signs of a developing cumulonimbus cloud approaching, try to stay safe by moving inside a building.

It will likely rain in a wide area from Kanto-Koshin to Tokai. Heavy rain with thunder is likely, especially along the mountains. Please be careful of lightning and gusts of wind. In addition, there will be temporary active rain clouds in urban areas, and people should be careful of flooding on roads and poor visibility.

Tohoku will be covered in clouds, and the south will be prone to rain clouds.

Hokkaido seems to receive a lot of sunlight during the day.

The sun will also reach Kyushu, Shikoku, and Okinawa, but there will be some temporary rain.

Weather for today, the 29th (Saturday): Rain in the Tohoku to Chugoku regions due to the front; intense heat in Kyushu and Shikoku

2026/08/29 06:46

Today, the 29th (Saturday), the Tohoku, Kinki, and Chugoku regions will experience rainy weather due to the influence of the autumn rain front that will be stationary near Honshu.
It is expected that there will be heavy rain in some places accompanied by thunder. The front is expected to gradually move northward, raising the risk of heavy rain again in the Hokuriku region.
In the Kyushu and Shikoku regions, there will be places where it will be sunny and extremely hot. You need to be careful about heat stroke.



There is a low pressure system in the sea near Chishima and it is moving east-northeast. The front is extending from the vicinity of the Korean Peninsula, through the Kinki and Tokai regions, and toward the east of Japan.
On the other hand, there is a high pressure system in the south of Japan, which is almost stagnant.

In Hokkaido, the low pressure around the Chishima Islands is expected to move away to the east, and the high pressure over the Sea of Okhotsk is expected to overhang. The sunlight will mainly reach the Sea of Japan side.

From Tohoku to Hokuriku, Kanto-Koshin, the Tokai region, and the Sea of Japan side of the Kinki and Chugoku regions, the weather will be prone to rain due to the influence of the autumn rain front.
Warm and humid air is expected to flow towards the front, causing unstable atmospheric conditions. There will be heavy rain in some places, accompanied by thunder.
Especially in the Hokuriku region, the ground has become loose in some places due to record heavy rain on the 27th. Please be extremely cautious of landslides.
Also, in the Tohoku and Chugoku regions, please be careful of landslides, flooding of low-lying areas, and rising river waters. Also be careful of strong wind gusts such as lightning and tornadoes.

The Shikoku and Kyushu regions are expected to be covered by a high pressure system in the south of Japan, and the weather will be sunny. However, please be careful of showers mainly along the mountains in the afternoon.



The predicted maximum temperature will be lower than yesterday in many places in northern and eastern Japan, and in Tokyo it will be 26c, which is 7c lower than yesterday, so it will feel cooler.

Western Japan is expected to experience midsummer days of over 30 degrees Celsius, with some places especially in the Shikoku and Kyushu regions expected to experience extremely hot days of over 35 degrees Celsius. Please be careful of heat stroke.

Kumamoto Prefecture, which was severely damaged by the 2020 Kumamoto Earthquake, is expected to experience temperatures of 37 degrees Celsius, which is similar to body temperature. Those involved in recovery work should take frequent breaks and remember to replenish water and an appropriate amount of salt.