62521 Weather (Decatur, IL)

Weather forecast for: Decatur IL

Last Update: 12:36 pm CDT Mar 12, 2026

This Afternoon: Increasing clouds, with a high near 50. Southwest wind around 10 mph, with gusts as high as 18 mph.

Tonight: Mostly cloudy, with a low around 41. Breezy, with a south wind 13 to 18 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 37 mph.

Friday: Mostly sunny, with a high near 54. Breezy, with a west wind 18 to 23 mph, with gusts as high as 44 mph.

Friday Night: Mostly cloudy, with a low around 33. West northwest wind 5 to 10 mph becoming northeast after midnight. Winds could gust as high as 17 mph.

Saturday: Mostly cloudy, with a high near 54. East southeast wind 7 to 11 mph, with gusts as high as 18 mph.

Saturday Night: Cloudy, with a low around 48. East southeast wind 10 to 16 mph, with gusts as high as 25 mph.

Sunday: Rain. High near 63. Breezy, with a south wind 16 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night: Rain and snow likely before 1am, then a chance of snow. Cloudy, with a low around 21. Blustery. Chance of precipitation is 70%.

Monday: Mostly cloudy, with a high near 26. Blustery.

Monday Night: Partly cloudy, with a low around 11.

Tuesday: Mostly sunny, with a high near 31.

Tuesday Night: Mostly cloudy, with a low around 24.

Wednesday: Mostly cloudy, with a high near 49.