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.

From now on, around September 2nd, there will be severe lingering heat in Kanto-Koshin and Kyushu, so be careful of heat stroke.

2026/08/28 22:03

Today, the 28th (Friday), temperatures rose in areas such as Kyushu and Shikoku, where the Pacific anticyclone covered the south of the front and the sunlight reached it, making it extremely hot.
The highest temperature was 38.3c in Kousa, Kousa Town, Kamimashiki District, Kumamoto Prefecture, and 37.5c in Minamata, Minamata City, Kumamoto Prefecture, which was hotter than body temperature.

Tomorrow, the 29th (Saturday), the sun will reach Kyushu and Shikoku, making it an extremely hot day in some places.
The predicted maximum temperature is 38c in Hita, Oita Prefecture, and 37c in Kurume, Fukuoka Prefecture, and Kumamoto, Kumamoto Prefecture, which is expected to exceed body temperature.
In addition, heatstroke warning alerts have been announced in 12 prefectures in western Japan. Please take measures to prevent heat stroke, such as taking frequent breaks and hydrating.




From now on, warm, humid air is expected to flow in from Kanto-Koshin to Kyushu until around Wednesday, September 2nd, resulting in some extremely hot days with maximum temperatures of 35c or higher.
Please take care of your health, such as preventing heat stroke, and managing your crops and livestock.



Looking at the forecast for the maximum temperature for the next week, Tokyo is expected to experience an extremely hot day of 35c on Monday the 31st.
In Nagoya, the temperature is likely to exceed body temperature, reaching 38c on the 31st (Monday) and 37c on September 1st (Tuesday).
In Osaka and Fukuoka, there will be many extremely hot days with temperatures reaching 35c until around Tuesday, September 1st.

Please check the "Heatstroke Warning Alert" jointly announced by the Japan Meteorological Agency and the Ministry of the Environment, and consider refraining from outdoor activities as much as possible on the days announced in your area.

Tomorrow's front moves northwards, Hokuriku region is at risk of heavy rain again; strict vigilance against landslides

2026/08/28 17:57

A front is extending from the vicinity of the Korean Peninsula to the east of Japan, passing through the Pacific side of eastern Japan. Additionally, a low-pressure system with cold air in the sky is moving northeast off the coast of Nemuro, creating a pressure trough from northern Japan to eastern Japan.

The front will remain stationary for most of today, the 28th, but it is expected to turn northward tomorrow, the 29th (Saturday), and move northward into the Tohoku region into the 30th (Sunday).

Due to the effects of warm, humid air flowing toward this front, cold air in the upper atmosphere, and a trough in atmospheric pressure, the atmospheric conditions will be extremely unstable from eastern Japan to western Japan until the 30th (Sunday), and in northern Japan until the 30th (Sunday), resulting in heavy rain with thunderstorms and very heavy rain of over 50 mm per hour, or heavy rain of over 30 mm per hour.
In particular, the Hokuriku region, which experienced record heavy rain yesterday on the 27th, is expected to experience heavy rain again in some places as the front moves northward, from Saturday the 29th tomorrow to Sunday the 30th.

Please be extremely cautious of landslides in the Hokuriku region from the 29th (Saturday) to the 30th (Sunday), and from eastern to western Japan from the 30th (Sunday) tomorrow, and in northern Japan from the 30th (Sunday) the following day, please be careful of landslides, flooding of low-lying areas, and rising river waters. In northern and western Japan, there are places where the ground has become loose due to past heavy rains, and there is a risk that the risk of landslides will increase even with less rain than usual. Please stay away from places near cliffs.



#Expected amount of rain (in areas with a lot of it)
+Precipitation expected for 24 hours by 18:00 tomorrow 29th (Sat)
Hokuriku region 100mm
Kinki region 10 0mm
Chugoku region 120mm
+Precipitation expected for 24 hours by 18:00 on the 30th (Sunday) the next day
Hokuriku region 120mm
Tohoku region 80mm

Weather for tomorrow 29th (Saturday): Heavy rain near the front

2026/08/28 17:54

Tomorrow, the autumn rain front will remain near Honshu, causing unstable atmospheric conditions. Rain clouds tend to develop around the front, and vigilance is required for localized heavy rain and thunderstorms.



Kyushu will be less affected by the front, and there will be many sunny days. There are many places with extremely hot days of over 35 degrees Celsius, so maximum vigilance against heat stroke is required. Make sure to drink plenty of water and rest in a cool place. In other parts of western Japan, there will be plenty of clouds, but there will be periods of sunshine, and it is expected to be a hot and humid day.
Close to the front, from southern Tohoku to eastern Japan, clouds will likely spread, and it will rain in places. In Hokuriku in particular, rain clouds are likely to develop due to the influence of moist air flowing in from the Sea of Japan, and heavy rain with localized thunder is expected. Please be especially careful in areas that have already been affected by heavy rain. Rain may become heavier temporarily in the Kanto and Tokai regions. Temperatures are not expected to rise due to the rain.
The weather will improve in Hokkaido and the sun will shine. There are many places where the temperature does not reach 25 degrees Celsius even during the day, making the weather relatively pleasant and sunny.
It's expected to be a cloudy day in the northern Tohoku region, with few midsummer days expected.

Typhoon No. 23 (Banrang) occurs, making it the 10th typhoon this month

2026/08/28 16:13

Typhoon No. 23 (Banrang) occurred near Wake Island at 12 noon today, the 28th. This is the 10th outbreak this month. There were many typhoons in August this year, about twice as many as in a normal year (5.7).

#Typhoon No. 23 Friday 28th 12:00
==================
Center location Near Wake Island
Movement Northeast 20km/h
Central pressure 1002 hPa
Maximum wind speed 18 m/s (near the center)
Maximum instantaneous wind speed 25 m/s
==================



The typhoon is expected to continue moving northward across the far east of Japan. It is not expected to develop much and is expected to turn into a tropical cyclone around the 1st (Thursday), and there is no expectation that there will be any direct impact on the Japanese archipelago.

[Risk of heavy rain again in Hokuriku] Be wary of new disasters (Commentary: Weather forecaster Atsuko Miyake)

2026/08/28 13:56

Ishikawa and Toyama prefectures, which have experienced record heavy rain, are likely to experience heavy rain again this weekend.
New disasters may occur, so vigilance is required.



Precipitation in the 48 hours up to 11 a.m. today (Friday) was 479 mm in Himi City, Toyama Prefecture, 357 mm in Hodatsushimizu Town, Ishikawa Prefecture,
and 347.5 mm in Hakui City, Ishikawa Prefecture,
all of which are heavy rains that are the highest in recorded history.

At this time, the front is moving south,
active clouds cover the area from the Sea of Japan to the Chugoku and Kinki regions.
Heavy rain exceeding 30mm per hour has been observed in Shimane Prefecture.

Meanwhile, clouds associated with a low pressure system are passing through Hokkaido, so please be careful of heavy rain and lightning in the evening.



The front is expected to gradually move northward into tomorrow (Sat).
Warm, humid air flows toward the front from the south.
The frontal activity is increasing, and it looks like heavy rain will once again occur in the Hokuriku region.



Rain cloud forecast.
Today, rain clouds will gradually move northward.
Linear rain clouds are also expected to develop over the Sea of Japan.

By the time the date changes to tomorrow (Saturday),
heavy rain is expected to increase again in Ishikawa and Toyama prefectures.

From around noon tomorrow, red signs will start to appear in Toyama and Ishikawa prefectures, and there is a risk of heavy rain, or even very heavy rain in some cases.
If rain clouds form in a line, there is a risk of more rain.

In addition, the Tokai region, Kanto-Koshin region, and Tohoku region are also likely to experience heavy rain in some places.
When going out, it's safe to have rain gear.

If rain clouds develop locally and become stagnant,
there is a risk of warning-level heavy rain.



In Hokuriku, where the ground has loosened due to the heavy rain that has fallen so far, there will be even more heavy rain.
New disasters may occur.

Please stay away from flooded rivers.
In large rivers, the water level may rise even after the rain has stopped, so please stay away from rivers even after the rain has stopped.
Please do not go to see the rice fields.

Also, cliffs that contain large amounts of rainwater may collapse, so
try to stay away from cliffs and slopes.

It looks like there will be some places where the rain peaks during the dark hours of the night.
It is actually dangerous to evacuate after dark.
Please move to a safe place now while it's daylight.



The front is expected to move further north the day after tomorrow (Sunday).
The reason this front is moving north is because the Pacific anticyclone to the south is becoming stronger.
As this Pacific high pressure system strengthens, the heat will return.



Let's take a look at the forecast for the coming week, focusing on the maximum temperature.

Fukuoka is expected to continue experiencing extremely hot days with temperatures exceeding 35c.
In Osaka, extremely hot days of over 35c are expected on the 31st and September 1st.
In Nagoya, it has been extremely hot days since the 30th, especially on Monday the 31st, when the temperature reached 38 degrees Celsius, making it unbearably hot.
Please be careful about heat stroke.
Even in the Kanto region, the last day of August, the 31st (Monday), is expected to be extremely hot with temperatures reaching 35 degrees Celsius.
Please be careful not to get sick.



Detailed weather information for each location.
Unstable atmospheric conditions will continue throughout the country into tomorrow (Saturday).
Please be careful of sudden changes in the weather even in sunny areas.

And in Kyushu, it continues to be extremely hot, exceeding 35 degrees Celsius.
If you live in an area affected by the Kumamoto Earthquake, please be careful not to get heatstroke while working on the recovery work.



Weekly forecast.
The heat will return to western and eastern Japan next week.
In Western Japan, there are many extremely hot days even into September.
Please continue to be careful of heat stroke.

It will continue to rain in northern Japan and Hokuriku into next week.
Please be careful about the rain and heavy rain here.

There is a risk of heavy rain in Hokkaido on September 2nd (Wednesday) due to the damp air.