DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

8:54 AM CST JAN 19, 2026
Overcast
7°F
Feels Like: -13°F
Dewpoint: -6°F
Rel. Hum.: 50%
Visibility: 10 miles
Wind: WNW at 21 mph, gusts to 30
Pressure: 30.30 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

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REST OF TODAY
Sunny, cooler with highs around 13. West winds 15 to 20 mph with gusts up to 35 mph. Wind chill values as low as 17 below.
TONIGHT
Partly cloudy in the evening, then clearing. Near steady temperature around 7 above. West winds 5 to 10 mph. Wind chill values as low as 6 below in the evening.
TUESDAY
Mostly sunny. Not as cool with highs around 30. Southwest winds 5 to 10 mph. Wind chill values as low as 3 below in the morning.
TUESDAY NIGHT
Mostly cloudy. Not as cool with lows in the mid 20s. Temperature rising into the lower 30s after midnight. South winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY
Partly sunny in the morning, then clearing. Highs in the upper 30s. West winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY NIGHT AND THURSDAY
Partly cloudy. Lows around 20. Highs in the upper 20s.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy. Lows around 10 above. Highs around 20. Wind chill values as low as 5 below.
FRIDAY NIGHT AND SATURDAY
Mostly cloudy. Lows 5 below to zero. Highs around 10 above. Wind chill values as low as 20 below.
SATURDAY NIGHT
Mostly cloudy. A chance of snow in the evening. Cold with lows around zero. Chance of snow 30 percent. Wind chill values as low as 10 below.
SUNDAY
Mostly sunny. Highs around 20. Wind chill values as low as 10 below in the morning.

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  1/18/2026
Monday
19 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 21° Mostly Cloudy 1%

0% Thunder
( 0% severe)
WNW   18 61% 11°
Low 5° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 13° -5° Mostly Cloudy WNW   21 53%
High 13° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM -13° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   21 52% -5°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM -14° Partly Cloudy WNW   20 50% -7°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM -10° Partly Cloudy 0%

0% Thunder
( 0% severe)
WNW   20 42% -7°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 13° -3° Clear WNW   16 34% -7°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 11° -2° Clear 0%

0% Thunder
( 0% severe)
W   9 40% -6°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 10° Partly Cloudy W   6 45% -5°
Tuesday
20 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 10° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   6 47% -4°
Low 6° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM -2° Partly Cloudy WSW   7 50% -4°
High 29° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM -2° Partly Cloudy 1%

0% Thunder
( 0% severe)
SW   7 56% -2°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 15° Partly Cloudy SSW   9 46%
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 25° 14° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   12 35%
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 29° 19° Partly Cloudy SSW   12 33%
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 26° 17° Partly Cloudy 2%

0% Thunder
( 0% severe)
S   9 42%
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 27° 16° Mostly Cloudy S   13 44% 10°

DECATUR, IL extended weather forecast

Wednesday
21 JAN 2026
Thursday
22 JAN 2026
Friday
23 JAN 2026
Saturday
24 JAN 2026
Sunday
25 JAN 2026
Low 22° Low 20° Low 3° Low -3° Low 7°
High 41° High 29° High 7° High 15° High 20°
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
Mostly Cloudy
8% Snow
Partly Cloudy
10% Snow
Mostly Cloudy
12% Snow
Overcast
14% Snow
Overcast
16% Snow
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