DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

5:54 PM CST DEC 1, 2025
Overcast
Light Snow
Mist
25°F
Feels Like: 25°F
Dewpoint: 23°F
Rel. Hum.: 91%
Visibility: 1 1/2 miles
Wind: Calm
Pressure: 30.13 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

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2025 Hurricanes

DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Snow, mainly this evening. Snow accumulation of 1 to 3 inches. Lows around 15. Southwest winds around 5 mph, becoming northwest around 5 mph after midnight. Chance of snow near 100 percent.
TUESDAY
Mostly cloudy. Highs in the lower 20s. Northwest winds 5 to 10 mph, becoming west in the afternoon.
TUESDAY NIGHT
Mostly cloudy. Lows around 16. Temperature rising into the lower 20s after midnight. South winds 5 to 10 mph.
WEDNESDAY
Partly sunny in the morning, then becoming mostly cloudy. Not as cool with highs in the lower 30s. Southwest winds 10 to 15 mph.
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 10 above. Wind chill values as low as 10 below in the morning.
THURSDAY NIGHT AND FRIDAY
Partly cloudy. Lows 5 below to zero. Highs in the upper 20s. Wind chill values as low as 15 below.
FRIDAY NIGHT THROUGH SUNDAY
Mostly cloudy. Lows around 20. Highs in the lower 30s.
SUNDAY NIGHT AND MONDAY
Mostly cloudy. Lows around 10 above. Highs in the upper 20s.

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 AM EST 12/ 1/2025
Monday
1 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 26° 19° Mostly Cloudy 81%
SNOW
***
0% Thunder
( 1% severe)
SE   6 91% 24°
High 28° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 27° 24° Overcast SSE   2 92% 25°
Overcast

Snow

DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 26° 23° Overcast 92%
SNOW
***
0% Thunder
( 0% severe)
SE   2 96% 25°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 25° 21° Mostly Cloudy W   2 96% 24°
Tuesday
2 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 23° 16° Mostly Cloudy 10%
SNOW
.1–1 in
0% Thunder
( 0% severe)
WNW   6 95% 22°
Low 15° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 20° 10° Mostly Cloudy WNW   8 95% 19°
High 24° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 17° Mostly Cloudy 1%

0% Thunder
( 0% severe)
NW   8 95% 16°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 19° Mostly Cloudy WNW   8 91% 17°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 22° 13° Mostly Cloudy 1%

0% Thunder
( 0% severe)
W   8 87% 19°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 23° 15° Mostly Cloudy W   7 83% 19°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 20° 12° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SSW   6 91% 18°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 20° 11° Mostly Cloudy S   7 91% 18°
Wednesday
3 DEC 2025
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM 20° 10° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   8 91% 18°
Low 17° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM 22° 11° Mostly Cloudy S   10 87% 19°
High 33° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM 22° 10° Mostly Cloudy 1%

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

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 26° 15° Mostly Cloudy SSW   12 87% 23°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 31° 22° Mostly Cloudy 18%
SNOW
<.1 in
0% Thunder
( 1% severe)
SSW   12 84% 27°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 33° 25° Mostly Cloudy WSW   10 81% 28°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 30° 22° Mostly Cloudy     W   8 92% 28°

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 6° Low -2° Low 22° Low 27° Low 19°
High 19° High 32° High 38° High 35° High 34°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Mostly Cloudy
29% Snow
Partly Cloudy
7% Snow
Mostly Cloudy
26% Rain/Snow
Overcast
59% Rain/Snow
Mostly Cloudy
15% Snow
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