DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

6:54 AM CST JAN 18, 2026
Overcast
12°F
Feels Like: 0°F
Dewpoint: 5°F
Rel. Hum.: 69%
Visibility: 10 miles
Wind: SW at 8 mph
Pressure: 30.13 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Partly sunny this morning, then cloudy with a chance of flurries this afternoon. Highs in the mid 20s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 2 below.
TONIGHT
Mostly cloudy. A chance of flurries in the evening. Brisk, cold with lows around 4 above. West winds 15 to 25 mph with gusts up to 35 mph. Wind chill values as low as 14 below after midnight.
MARTIN LUTHER KING JR DAY
Sunny, brisk, cooler with highs around 14. Northwest winds 15 to 25 mph with gusts up to 35 mph. Wind chill values as low as 18 below.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Near steady temperature around 9 above. West winds 5 to 10 mph. Wind chill values as low as 5 below.
TUESDAY
Mostly sunny. Not as cool with highs in the upper 20s. Southwest winds 10 to 15 mph. Wind chill values as low as 5 below in the morning.
TUESDAY NIGHT
Mostly cloudy. Not as cool with lows in the lower 20s. Temperature rising into the upper 20s after midnight.
WEDNESDAY AND WEDNESDAY NIGHT
Partly cloudy. Highs in the upper 30s. Lows 15 to 20.
THURSDAY
Mostly sunny. Highs in the upper 20s.
THURSDAY NIGHT
Mostly cloudy. Near steady temperature in the lower 20s.
FRIDAY
Mostly cloudy. A chance of rain in the afternoon. Highs in the upper 30s. Chance of rain 30 percent.
FRIDAY NIGHT
Mostly cloudy with a 40 percent chance of snow. Lows 15 to 20.
SATURDAY
Partly sunny. A chance of snow in the afternoon. Cooler with highs in the mid 20s. Chance of snow 30 percent.

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  1/17/2026
Sunday
18 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 14° Mostly Cloudy 0%

0% Thunder
( 0% severe)
W   13 60%
Low 10° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 13° -1° Partly Cloudy W   12 59%
High 25° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 11° -3° Partly Cloudy 5%

0% Thunder
( 0% severe)
WSW   10 62%

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 14° Partly Cloudy WSW   12 51%
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 20° Mostly Cloudy 11%
RAIN/SNOW
<.05 in
0% Thunder
( 1% severe)
SSW   15 40%
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 24° 11° Mostly Cloudy SSW   15 37%
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 24° 13° Mostly Cloudy 4%

0% Thunder
( 0% severe)
SW   12 41%
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 23° 10° Mostly Cloudy WNW   15 50%
Monday
19 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 19° Mostly Cloudy 0%

0% Thunder
( 0% severe)
WNW   18 55%
Low 4° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 13° -5° Partly Cloudy WNW   21 53%
High 13° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM -11° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   20 50% -5°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM -14° Partly Cloudy WNW   20 50% -7°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 10° -8° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   18 40% -7°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 13° -3° Clear WNW   16 34% -7°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 11° -3° Clear 0%

0% Thunder
( 0% severe)
W   10 40% -6°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM -2° Partly Cloudy W   7 45% -6°

DECATUR, IL extended weather forecast

Tuesday
20 JAN 2026
Wednesday
21 JAN 2026
Thursday
22 JAN 2026
Friday
23 JAN 2026
Saturday
24 JAN 2026
Low 7° Low 21° Low 19° Low 20° Low 16°
High 26° High 37° High 30° High 37° High 16°
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
2% Snow
Partly Cloudy
12% Snow
Partly Cloudy
16% Snow
Mostly Cloudy
36% Snow
Overcast
66% Snow/Ice
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