DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

11:54 PM CST DEC 13, 2025
Clear
1°F
Feels Like: -18°F
Dewpoint: -4°F
Rel. Hum.: 76%
Visibility: 10 miles
Wind: WNW at 14 mph
Pressure: 30.45 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

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REST OF TONIGHT
Mostly clear. Much colder with lows around 5 below. Northwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 24 below.
SUNDAY
Sunny. Much colder with highs around 4 above. Northwest winds 5 to 10 mph. Wind chill values as low as 24 below.
SUNDAY NIGHT
Mostly clear. Cold with lows around 6 below. Temperature rising to around 2 above after midnight. Southwest winds around 5 mph, increasing to south 10 to 15 mph after midnight. Wind chill values as low as 19 below.
MONDAY
Mostly sunny. Not as cool with highs in the upper 20s. Southwest winds 15 to 20 mph. Wind chill values as low as 14 below in the morning.
MONDAY NIGHT
Partly cloudy in the evening, then clearing. Not as cool with lows around 17. Southwest winds 5 to 10 mph.
TUESDAY
Mostly sunny. Not as cool with highs in the upper 30s.
TUESDAY NIGHT AND WEDNESDAY
Mostly cloudy. Lows around 30. Highs in the lower 40s.
WEDNESDAY NIGHT
Mostly cloudy. A chance of rain after midnight. Lows in the mid 30s. Temperature rising into the mid 40s after midnight. Chance of rain 30 percent.
THURSDAY
Mostly cloudy with a chance of rain in the morning, then partly sunny in the afternoon. Not as cool with highs in the lower 50s. Temperature falling to around 40 in the afternoon. Chance of rain 50 percent.
THURSDAY NIGHT AND FRIDAY
Partly cloudy. Lows around 20. Highs in the mid 30s.
FRIDAY NIGHT AND SATURDAY
Mostly cloudy. Lows in the upper 20s. Highs in the upper 40s.

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 12/13/2025
Sunday
14 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM -15° Partly Cloudy 1%

0% Thunder
( 0% severe)
NW   12 76% -3°
Low -5° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM -1° -18° Partly Cloudy NW   12 72% -7°
High 4° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM -4° -23° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   13 76% -9°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM -3° -21° Partly Cloudy NNW   12 76% -8°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM -14° Clear 0%

0% Thunder
( 0% severe)
NW   9 72% -5°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM -9° Clear WNW   8 65% -4°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM -2° -10° Clear 0%

0% Thunder
( 0% severe)
W   3 76% -7°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM -3° -11° Partly Cloudy SW   3 76% -8°
Monday
15 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM -3° -13° Clear 0%

0% Thunder
( 0% severe)
S   5 80% -7°
Low -4° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM -14° Clear S   9 72% -5°
High 28° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM -14° Clear 1%

0% Thunder
( 0% severe)
S   14 72% -2°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 12° -5° Partly Cloudy SSW   16 66%
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 22° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   15 58% 11°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 27° 16° Partly Cloudy SW   13 60% 16°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 24° 14° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   9 68% 16°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 23° 15° Partly Cloudy SW   7 72% 16°

DECATUR, IL extended weather forecast

Tuesday
16 DEC 2025
Wednesday
17 DEC 2025
Thursday
18 DEC 2025
Friday
19 DEC 2025
Saturday
20 DEC 2025
Low 13° Low 28° Low 38° Low 19° Low 25°
High 42° High 46° High 46° High 34° High 44°
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
Clear
3% Rain/Snow
Clear
8% Rain
Overcast
79% Rain
Partly Cloudy
15% Snow
Mostly Cloudy
23% Rain/Snow
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