DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

8:54 AM CDT APR 7, 2026
Overcast
36°F
Feels Like: 26°F
Dewpoint: 23°F
Rel. Hum.: 58%
Visibility: 10 miles
Wind: ENE at 17 mph
Pressure: 30.49 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Cloudy. A slight chance of snow this morning. Highs in the upper 40s. East winds 10 to 15 mph. Chance of snow 20 percent.
TONIGHT
Mostly cloudy. Lows in the upper 30s. Southeast winds 10 to 15 mph.
WEDNESDAY
Partly sunny. Not as cool with highs in the upper 60s. South winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY NIGHT
Partly cloudy. Not as cool with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph.
THURSDAY
Mostly sunny. Highs in the mid 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
THURSDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the mid 50s. Chance of rain 40 percent.
FRIDAY
Showers likely, mainly in the morning. Highs in the upper 60s. Chance of rain 60 percent.
FRIDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the upper 40s.
SATURDAY
Partly sunny in the morning, then becoming mostly cloudy. A 30 percent chance of showers. Highs in the upper 60s.
SATURDAY NIGHT AND SUNDAY
Mostly cloudy and breezy. Lows in the upper 50s. Highs in the upper 70s.
SUNDAY NIGHT AND MONDAY
Mostly cloudy. A chance of showers. Breezy. Lows in the lower 60s. Highs in the lower 80s. Chance of rain 50 percent.

Visible Weather Satellite
DECATUR, IL 62521
Infrared Weather Satellite
DECATUR, IL 62521
NEXRAD Weather Radar
DECATUR, IL 62521

DECATUR, IL 3 hourly weather forecast

weather forecast created  8:00 PM EDT  4/ 6/2026
Tuesday
7 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 42° 36° Mostly Cloudy 11%
RAIN
<.01 in
0% Thunder
( 1% severe)
N   10 57% 28°
Low 32° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 37° 29° Mostly Cloudy NE   12 66% 27°
High 48° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 33° 24° Mostly Cloudy 9%

0% Thunder
( 1% severe)
ENE   12 71% 25°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 38° 30° Mostly Cloudy E   12 56% 24°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 43° 37° Mostly Cloudy 4%

0% Thunder
( 1% severe)
E   12 44% 23°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 47° 42° Mostly Cloudy E   12 38% 23°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 45° 40° Partly Cloudy 10%
RAIN
<.01 in
0% Thunder
( 3% severe)
E   10 41% 23°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 41° 35° Partly Cloudy ESE   10 50% 24°
Wednesday
8 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 40° 33° Mostly Cloudy 3%

0% Thunder
( 2% severe)
SE   12 54% 25°
Low 36° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 38° 30° Mostly Cloudy SE   13 56% 24°
High 68° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 37° 28° Mostly Cloudy 0%

0% Thunder
( 1% severe)
SSE   14 61% 25°

Mostly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 49° 43° Mostly Cloudy SSE   16 48% 30°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 62° 60° Mostly Cloudy 1%

0% Thunder
( 1% severe)
S   18 39% 37°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 67° 67° Partly Cloudy S   20 37% 40°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 64° 62° Partly Cloudy 2%

0% Thunder
( 1% severe)
S   16 45% 42°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 59° 56° Partly Cloudy S   16 57% 44°

DECATUR, IL extended weather forecast

Thursday
9 APR 2026
Friday
10 APR 2026
Saturday
11 APR 2026
Sunday
12 APR 2026
Monday
13 APR 2026
Low 54° Low 54° Low 44° Low 54° Low 58°
High 73° High 63° High 64° High 77° High 72°
DECATUR, IL 62521 weather forecast Day 3 DECATUR, IL 62521 weather forecast Day 4 DECATUR, IL 62521 weather forecast Day 5 DECATUR, IL 62521 weather forecast Day 6 DECATUR, IL 62521 weather forecast Day 7
Mostly Cloudy
14% Rain
Overcast
69% Rain
Overcast
34% Rain
Overcast
37% Rain
Overcast
43% Rain
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