DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

10:54 AM CST DEC 6, 2025
Scattered Clouds
36°F
Feels Like: 32°F
Dewpoint: 28°F
Rel. Hum.: 72%
Visibility: 7 miles
Wind: E at 5 mph
Pressure: 29.98 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
Mostly cloudy. Near steady temperature in the mid 30s. West winds around 5 mph, becoming southwest this afternoon.
TONIGHT
Cloudy. A slight chance of freezing rain and snow in the evening, then a chance of rain and freezing rain after midnight. Ice accumulation around a trace. Lows in the upper 20s. Temperature rising into the lower 30s after midnight. Southeast winds 5 to 10 mph. Chance of precipitation 50 percent.
SUNDAY
Mostly cloudy. A chance of rain and snow in the morning. Little or no snow accumulation. Highs in the mid 30s. Temperature falling into the upper 20s in the afternoon. Northwest winds 10 to 15 mph, becoming north in the afternoon. Chance of precipitation 50 percent.
SUNDAY NIGHT
Mostly cloudy. Much cooler with lows around 10 above. North winds 10 to 15 mph.
MONDAY
Mostly sunny. Cooler with highs in the mid 20s. Northeast winds around 5 mph, becoming southeast in the afternoon.
MONDAY NIGHT
Partly cloudy. Lows 10 to 15. Temperature rising into the mid 20s after midnight.
TUESDAY
Partly sunny. Not as cool with highs around 40.
TUESDAY NIGHT
Mostly cloudy. A chance of rain after midnight. Not as cool. Near steady temperature in the upper 30s. Chance of rain 40 percent.
WEDNESDAY
Mostly cloudy. A chance of rain in the morning. Highs in the upper 30s. Temperature falling into the lower 30s in the afternoon. Chance of rain 30 percent.
WEDNESDAY NIGHT
Mostly cloudy. Much cooler with lows around 20.
THURSDAY
Mostly cloudy with a 30 percent chance of snow. Highs in the upper 20s.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy. Lows 10 to 15. Highs in the lower 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 AM EST 12/ 6/2025
Saturday
6 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 33° 29° Mostly Cloudy 1%

0% Thunder
( 0% severe)
W   5 92% 31°
High 35° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 34° 31° Mostly Cloudy SSE   3 85% 30°
Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 30° 24° Mostly Cloudy 16%
RAIN
<.01 in
0% Thunder
( 1% severe)
SE   6 92% 28°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 30° 23° Mostly Cloudy ESE   7 92% 28°
Sunday
7 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 31° 24° Mostly Cloudy 35%
RAIN
.01–.1 in
0% Thunder
( 1% severe)
SSE   7 96% 30°
Low 26° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 33° 25° Mostly Cloudy SSE   9 92% 31°
High 35° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 33° 26° Mostly Cloudy 24%
RAIN
.01–.1 in
0% Thunder
( 1% severe)
S   8 96% 32°

Mostly Cloudy

Chance of Rain

DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 34° 26° Mostly Cloudy WSW   10 96% 33°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 32° 22° Mostly Cloudy 7%

0% Thunder
( 0% severe)
N   14 92% 30°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 30° 19° Mostly Cloudy N   14 84% 26°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 24° 13° Mostly Cloudy 8%

0% Thunder
( 0% severe)
N   12 83% 20°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 21° 10° Mostly Cloudy N   10 83% 17°
Monday
8 DEC 2025
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM 17° Mostly Cloudy 4%

0% Thunder
( 0% severe)
NNE   8 86% 14°
Low 12° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM 16° Mostly Cloudy NNE   7 82% 12°
High 25° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM 15° Mostly Cloudy 2%

0% Thunder
( 0% severe)
NNE   6 82% 11°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 17° 10° Partly Cloudy ENE   5 82% 13°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 23° 17° Partly Cloudy 1%

0% Thunder
( 0% severe)
ESE   5 68% 15°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 25° 19° Partly Cloudy S   5 65% 16°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 20° 12° Partly Cloudy     SSE   6 75% 14°

DECATUR, IL extended weather forecast

Tuesday
9 DEC 2025
Wednesday
10 DEC 2025
Thursday
11 DEC 2025
Friday
12 DEC 2025
Saturday
13 DEC 2025
Low 22° Low 35° Low 26° Low 18° Low 7°
High 46° High 44° High 37° High 22° High 25°
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
10% Rain/Snow
Mostly Cloudy
32% Rain/Snow
Overcast
54% Rain/Snow
Overcast
34% Snow
Mostly Cloudy
14% Snow
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