DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

8:54 AM CST DEC 2, 2025
Overcast
Mist
18°F
Feels Like: 6°F
Dewpoint: 16°F
Rel. Hum.: 91%
Visibility: 5 miles
Wind: W at 10 mph
Pressure: 30.09 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


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(Automated weather data from NWS/FAA)
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2025 Hurricanes

DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly cloudy. Highs in the lower 20s. West winds around 5 mph.
TONIGHT
Mostly cloudy. Lows around 16. Temperature rising to around 20 after midnight. South winds 5 to 10 mph.
WEDNESDAY
Mostly cloudy. A chance of rain in the afternoon. Not as cool with highs in the mid 30s. Southwest winds 10 to 15 mph. Chance of rain 30 percent.
WEDNESDAY NIGHT
Mostly cloudy. Colder with lows around 3 above. Northwest winds 10 to 15 mph. Wind chill values as low as 10 below after midnight.
THURSDAY
Sunny. Much cooler with highs around 14. North winds 5 to 10 mph. Wind chill values as low as 11 below in the morning.
THURSDAY NIGHT
Mostly clear. Cold with lows around zero.
FRIDAY
Mostly sunny. Not as cool with highs in the upper 20s. Wind chill values as low as 5 below in the morning.
FRIDAY NIGHT THROUGH SUNDAY
Mostly cloudy. Lows 15 to 20. Highs in the upper 20s.
SUNDAY NIGHT AND MONDAY
Mostly cloudy. Lows around 10 above. Highs in the upper 20s. Wind chill values as low as zero.

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 12/ 1/2025
Tuesday
2 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 23° 16° Overcast 9%

0% Thunder
( 0% severe)
WNW   6 95% 22°
Low 16° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 20° 10° Mostly Cloudy WNW   8 91% 18°
High 24° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 17° Mostly Cloudy 1%

0% Thunder
( 0% severe)
NW   7 95% 16°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 19° 10° Mostly Cloudy WNW   7 91% 17°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 22° 13° Mostly Cloudy 2%

0% Thunder
( 0% severe)
W   7 87% 19°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 23° 15° Mostly Cloudy WSW   7 83% 19°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 20° 12° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SSW   6 87% 17°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 19° 10° Mostly Cloudy S   7 91% 17°
Wednesday
3 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 19° Mostly Cloudy 2%

0% Thunder
( 0% severe)
S   8 91% 17°
Low 16° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 21° 10° Mostly Cloudy S   10 87% 18°
High 34° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 22° 10° Mostly Cloudy 1%

0% Thunder
( 0% severe)
SSW   12 87% 19°

Mostly Cloudy

Chance of Snow

DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 26° 15° Mostly Cloudy SSW   12 87% 23°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 31° 22° Mostly Cloudy 26%
SNOW
<.1 in
0% Thunder
( 0% severe)
SW   12 88% 28°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 33° 25° Mostly Cloudy WSW   10 85% 29°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 31° 23° Mostly Cloudy 22%
SNOW
.1–1 in
0% Thunder
( 1% severe)
WNW   9 88% 28°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 28° 18° Mostly Cloudy NNW   12 88% 25°

DECATUR, IL extended weather forecast

Thursday
4 DEC 2025
Friday
5 DEC 2025
Saturday
6 DEC 2025
Sunday
7 DEC 2025
Monday
8 DEC 2025
Low 7° Low 2° Low 13° Low 23° Low 15°
High 19° High 30° High 33° High 33° High 28°
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
13% Snow
Mostly Cloudy
8% Snow
Mostly Cloudy
25% Snow
Overcast
68% Snow/Ice
Mostly Cloudy
13% Snow
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