See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
24°
Overcast
Feels Like: 25°
Min: 23°
Max: 31°
The next few hours will be drizzle, with today reaching 31°C and dropping to 23°C. The coming days will be light rain throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:45
Sunrise
17:44
Sunset
Moon
Waxing Gibbous
14:54
Moonrise
00:48
Moonset
Daily Forecast
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Air Quality Data Available
Upgrade to access real-time air quality data for Kasamatsuchō.
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Kasamatsuchō.
View stargazing scoreWeather in Kasamatsuchō today, September 21, 2026
Expect unsettled, showery conditions in Kasamatsuchō on September 21, 2026 as rain moves through. The day opens on a wet note and needs flexible outdoor plans. The morning carries the wetter risk, with rain chances near 80% and the highest odds around 04:00. Cloud is also thick early on, peaking near 100% around 08:00.
Expect highs of 31°C and cooler readings close to 23°C. The air stays humid, with relative humidity between 64% and 95% and the peak around 03:00. Winds stay light, near 6.7 km/h by 21:00, so the day feels still more than breezy.
The afternoon should feel quieter than the damp start, with rain probability easing to about 0% after morning values near 80%. Cloud cover stays around 100% by 12:00. Visibility holds near 15.6 km, though it can fall to 8.2 km. Expect sunrise at 05:45, sunset at 17:44, and 11 hours 58 minutes of sunlight today overall.
In short, treat September 21, 2026 in Kasamatsuchō as a damp day: pack covers, watch the wetter hours, and expect a high near 31°C.
Frequently asked questions about weather in Kasamatsuchō
How warm does it get in Kasamatsuchō?
The warmest month in Kasamatsuchō is August, with average high temperatures of 33°C. The average temperature during this period is around 29°C.
How cold does it get in Kasamatsuchō?
The coldest month in Kasamatsuchō is January, with average low temperatures of 1°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Kasamatsuchō?
The wettest month in Kasamatsuchō is July, with an average of 301mm of precipitation.
What is the driest time of year in Kasamatsuchō?
The driest month in Kasamatsuchō is January, with an average of 52mm of precipitation.
