62522 Weather (Decatur, IL)

Weather forecast for: Decatur IL

Last Update: 9:26 pm CDT Mar 10, 2026

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 50. South southwest wind 16 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday: Rain and possibly a thunderstorm before noon, then a chance of rain between noon and 3pm. Temperature falling to around 45 by 5pm. Breezy, with a west southwest wind 14 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Wednesday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 29. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.

Thursday: Increasing clouds, with a high near 49. West southwest wind 6 to 11 mph, with gusts as high as 18 mph.

Thursday Night: Mostly cloudy, with a low around 42. Breezy, with a south wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph.

Friday: Partly sunny, with a high near 55. Breezy, with a west wind 16 to 21 mph, with gusts as high as 34 mph.

Friday Night: Mostly cloudy, with a low around 34. Northwest wind 6 to 9 mph becoming east after midnight. Winds could gust as high as 15 mph.

Saturday: Mostly cloudy, with a high near 58.

Saturday Night: A 40 percent chance of rain after 1am. Mostly cloudy, with a low around 45.

Sunday: Rain. High near 59. Breezy. Chance of precipitation is 80%.

Sunday Night: A chance of rain and snow. Mostly cloudy, with a low around 17. Blustery.

Monday: Mostly sunny, with a high near 29.

Monday Night: Mostly clear, with a low around 14.

Tuesday: Partly sunny, with a high near 37.