DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

2:54 AM CST FEB 24, 2026
Clear
18°F
Feels Like: 9°F
Dewpoint: 12°F
Rel. Hum.: 74%
Visibility: 10 miles
Wind: SSW at 7 mph
Pressure: 30.20 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TONIGHT
Mostly cloudy. Near steady temperature around 19. South winds 5 to 10 mph with gusts up to 20 mph.
TUESDAY
Mostly cloudy and breezy. Not as cool with highs in the mid 40s. South winds 15 to 25 mph with gusts up to 40 mph.
TUESDAY NIGHT
Mostly cloudy. Not as cool with lows in the upper 20s. Southwest winds 10 to 15 mph, becoming northwest after midnight.
WEDNESDAY
Mostly sunny. Highs in the mid 40s. Northwest winds 5 to 10 mph with gusts up to 20 mph.
WEDNESDAY NIGHT
Mostly cloudy. A chance of rain and snow in the evening, then snow and rain likely after midnight. Light snow accumulation possible. Lows in the upper 20s. Northeast winds 5 to 10 mph. Chance of precipitation 70 percent.
THURSDAY
Mostly sunny. A chance of rain and snow in the morning. Highs in the mid 40s. Chance of precipitation 30 percent.
THURSDAY NIGHT
Mostly clear. Lows in the upper 20s.
FRIDAY
Sunny. Not as cool with highs in the upper 50s.
FRIDAY NIGHT
Mostly clear. Lows in the mid 30s.
SATURDAY AND SATURDAY NIGHT
Partly cloudy. Highs in the mid 50s. Lows in the mid 20s.
SUNDAY
Partly sunny. A chance of rain and snow in the afternoon. Much cooler with highs around 40. Chance of precipitation 30 percent.
SUNDAY NIGHT
Mostly cloudy with a 50 percent chance of snow. Lows in the mid 20s.
MONDAY
A chance of snow in the morning. Partly sunny with a chance of rain. Highs in the lower 40s. Chance of precipitation 30 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  7:00 PM EST  2/23/2026
Tuesday
24 FEB 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 20° 16° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   2 64% 11°
Low 19° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 20° 11° Mostly Cloudy SSW   7 64% 11°
High 45° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 21° Mostly Cloudy 1%

0% Thunder
( 0% severe)
S   12 61% 11°

Mostly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 27° 14° Mostly Cloudy S   18 52% 13°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 38° 27° Mostly Cloudy 3%

0% Thunder
( 0% severe)
S   22 38% 16°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 44° 36° Mostly Cloudy SSW   21 39% 21°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 43° 36° Mostly Cloudy 8%

0% Thunder
( 1% severe)
SSW   15 48% 25°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 41° 33° Mostly Cloudy WSW   14 59% 28°
Wednesday
25 FEB 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 39° 32° Mostly Cloudy 4%

0% Thunder
( 1% severe)
WNW   12 70% 30°
Low 28° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 34° 26° Mostly Cloudy WNW   10 78% 28°
High 45° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 30° 22° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   8 84% 26°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 35° 28° Partly Cloudy WNW   9 66% 25°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 43° 37° Partly Cloudy 3%

0% Thunder
( 0% severe)
WNW   10 42% 22°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 45° 40° Partly Cloudy WNW   9 39% 22°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 40° 36° Mostly Cloudy 40%
RAIN
***
0% Thunder
( 2% severe)
N   6 49% 23°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 36° 30° Mostly Cloudy NNE   7 63% 25°

DECATUR, IL extended weather forecast

Thursday
26 FEB 2026
Friday
27 FEB 2026
Saturday
28 FEB 2026
Sunday
1 MAR 2026
Monday
2 MAR 2026
Low 26° Low 26° Low 36° Low 29° Low 24°
High 37° High 54° High 50° High 37° High 36°
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
Overcast
65% Snow
Partly Cloudy
5% Rain/Snow
Partly Cloudy
13% Rain
Partly Cloudy
29% Rain/Snow
Overcast
49% Snow
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