10-day forecast

Today Mostly cloudy 4% 50° 85° Today · UV 4 · Wind 11 mph · ☀ 7:00 AM – 6:27 PM
Sat 10 Cloudy 1% 60° 82° Saturday, October 10 · UV 3 · Wind 11 mph · ☀ 7:01 AM – 6:25 PM
Sun 11 Drizzle 50% 59° 77° Sunday, October 11 · UV 3 · Wind 9 mph · ☀ 7:03 AM – 6:24 PM
Mon 12 Mostly cloudy 0% 58° 87° Monday, October 12 · UV 4 · Wind 13 mph · ☀ 7:04 AM – 6:22 PM
Tue 13 Clear 0% 65° 81° Tuesday, October 13 · UV 4 · Wind 13 mph · ☀ 7:05 AM – 6:21 PM
Wed 14 Showers 65% 58° 77° Wednesday, October 14 · UV 1 · Wind 13 mph · ☀ 7:06 AM – 6:19 PM
Thu 15 Showers 65% 60° 76° Thursday, October 15 · UV 3 · Wind 16 mph · ☀ 7:07 AM – 6:18 PM
Fri 16 Showers 5% 48° 67° Friday, October 16 · UV 3 · Wind 16 mph · ☀ 7:08 AM – 6:16 PM
Sat 17 Mostly cloudy 0% 44° 60° Saturday, October 17 · UV 1 · Wind 13 mph · ☀ 7:09 AM – 6:15 PM
Sun 18 Mostly clear 0% 42° 63° Sunday, October 18 · UV 3 · Wind 9 mph · ☀ 7:10 AM – 6:13 PM

14-day outlook & extended hourly ★ Premium

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About Decatur weather

Decatur is in Macon County, Illinois, United States at 39.84°, -88.95°. Right now it’s 48° and clear; today’s high is 85° with a 4% chance of rain.

Illinois has a humid continental climate with distinct seasons marked by cold, snowy winters and hot, humid summers. The state's flat terrain allows weather systems to move across without obstruction, leading to rapid temperature changes. Chicago's position on Lake Michigan creates a unique lake-effect weather pattern that can moderate summer heat and intensify winter snowfall.