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Hourly Forecast
Daylight Hours
05:31
Sunrise
17:30
Sunset
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Waxing Gibbous
14:46
Moonrise
00:27
Moonset
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View stargazing scoreWeather in Kōriyama today, September 21, 2026
Kōriyama starts September 21, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Early hours look the most unsettled, with rain probability near 100% by 10:00. The thickest cloud arrives around 00:00, reaching about 100%.
Expect highs of 23°C and cooler readings close to 20°C. Relative humidity sits between 98% and 98%, reaching its peak around 00:00. Winds stay light, near 6.9 km/h by 21:00, so the day feels still more than breezy.
Expect the wet theme to continue later, as rain odds reach 100% near 12:00. Cloud amounts hold near 100% around 12:00. Visibility stays generally good near 3.6 km on average, though it can drop toward 0.1 km in thicker cloud or showers. Expect sunrise at 05:31, sunset at 17:30, and 11 hours 58 minutes of sunlight today overall.
Overall, Kōriyama on September 21, 2026 suits indoor plans or waterproof kit, especially while rain chances stay near 100% and the high sits around 23°C.
Frequently asked questions about weather in Kōriyama
How warm does it get in Kōriyama?
The warmest month in Kōriyama is August, with average high temperatures of 29°C. The average temperature during this period is around 25°C.
How cold does it get in Kōriyama?
The coldest month in Kōriyama is January, with average low temperatures of -3°C. The average temperature during this period is around 0°C.
What is the wettest time of year in Kōriyama?
The wettest month in Kōriyama is August, with an average of 156mm of precipitation.
What is the driest time of year in Kōriyama?
The driest month in Kōriyama is February, with an average of 48mm of precipitation.
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