See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
12°
Light Rain
Feels Like: 11°
Min: 12°
Max: 16°
The next few hours will be overcast, with today reaching 16°C and dropping to 11°C. The coming days will be cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:24
Sunrise
18:46
Sunset
Moon
Waxing Crescent
11:33
Moonrise
19:56
Moonset
Daily Forecast
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Wednesday
Thursday
Friday
Saturday
Sunday
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Thursday
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Weather in Sumy today, September 15, 2026
Rain features in Sumy on September 15, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. Wetter spells lean into the morning, when rain odds reach about 40% near 07:00. Skies look heaviest around 07:00, with cover close to 100%.
Temperatures climb from an overnight low near 12°C toward a daytime high of about 16°C. Expect humidity between 67% and 91%, most humid near 07:00. Expect gentle winds, highest near 13:00 at 4.6 km/h.
The afternoon should feel quieter than the damp start, with rain probability easing to about 0% after morning values near 40%. Cloud cover stays around 100% by 12:00. Visibility holds near 33.0 km, though it can fall to 17.8 km. Daylight runs from 06:24 to 18:46, lasting 12 hours 21 minutes of sunlight today.
In short, treat September 15, 2026 in Sumy as a damp day: pack covers, watch the wetter hours, and expect a high near 16°C.
Frequently asked questions about weather in Sumy
How warm does it get in Sumy?
The warmest month in Sumy is August, with average high temperatures of 27°C. The average temperature during this period is around 21°C.
How cold does it get in Sumy?
The coldest month in Sumy is January, with average low temperatures of -7°C. The average temperature during this period is around -4°C.
What is the wettest time of year in Sumy?
The wettest month in Sumy is July, with an average of 76mm of precipitation.
What is the driest time of year in Sumy?
The driest month in Sumy is September, with an average of 34mm of precipitation.
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