DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

9:54 AM CST DEC 3, 2025
Overcast
Mist
27°F
Feels Like: 13°F
Dewpoint: 23°F
Rel. Hum.: 84%
Visibility: 6 miles
Wind: SSW at 20 mph
Pressure: 30.09 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 TODAY
Cloudy. A chance of snow this afternoon. Little or no snow accumulation. Highs in the lower 30s. Southwest winds 10 to 15 mph. Chance of snow 40 percent.
TONIGHT
Cloudy. A chance of snow in the evening. Much colder with lows around 4 above. North winds 10 to 15 mph. Chance of snow 30 percent. Wind chill values as low as 8 below after midnight.
THURSDAY
Sunny. Much cooler with highs around 16. 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 1 below. Temperature rising to around 5 above after midnight. Southeast winds around 5 mph.
FRIDAY
Mostly sunny. Not as cool with highs in the upper 20s. South winds 5 to 10 mph. Wind chill values as low as 5 below in the morning.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
Mostly cloudy. Lows around 20. Highs in the upper 20s.
SUNDAY
Mostly cloudy. A chance of snow in the afternoon. Highs in the upper 20s. Chance of snow 30 percent.
SUNDAY NIGHT THROUGH MONDAY NIGHT
Mostly cloudy. Lows around 20. Highs in the upper 20s.
TUESDAY
Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 30s.

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/ 2/2025
Wednesday
3 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 19° Mostly Cloudy 2%

0% Thunder
( 0% severe)
SSW   8 91% 17°
Low 18° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 20° Mostly Cloudy S   10 87% 17°
High 34° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 21° Mostly Cloudy 4%

0% Thunder
( 0% severe)
SSW   12 91% 19°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 26° 15° Mostly Cloudy SSW   12 87% 23°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 31° 22° Mostly Cloudy 18%
RAIN/SNOW
<.05 in
0% Thunder
( 0% severe)
SW   12 84% 27°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 32° 24° Mostly Cloudy WSW   9 85% 28°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 30° 22° Overcast 18%
SNOW
<.1 in
0% Thunder
( 0% severe)
WNW   8 92% 28°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 27° 17° Overcast NNW   10 87% 24°
Thursday
4 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 21° Mostly Cloudy 4%

0% Thunder
( 0% severe)
N   12 83% 17°
Low 6° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 15° Mostly Cloudy N   12 82% 11°
High 17° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 10° -3° Mostly Cloudy 0%

0% Thunder
( 0% severe)
N   9 81%

Decreasing Clouds



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM -3° Partly Cloudy N   8 81%
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 13° Clear 0%

0% Thunder
( 0% severe)
N   6 70%
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 15° Clear N   3 63%
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM Clear 0%

0% Thunder
( 0% severe)
E   2 69%
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM -1° Partly Cloudy SE   3 77%

DECATUR, IL extended weather forecast

Friday
5 DEC 2025
Saturday
6 DEC 2025
Sunday
7 DEC 2025
Monday
8 DEC 2025
Tuesday
9 DEC 2025
Low 4° Low 20° Low 22° Low 16° Low 21°
High 30° High 35° High 31° High 29° High 39°
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
Partly Cloudy
3% Snow
Overcast
18% Snow
Overcast
50% Snow
Mostly Cloudy
20% Snow
Overcast
12% Snow/Ice
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