DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

2:54 AM CST JAN 11, 2026
Overcast
25°F
Feels Like: 10°F
Dewpoint: 16°F
Rel. Hum.: 65%
Visibility: 10 miles
Wind: NW at 22 mph, gusts to 37
Pressure:
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. Isolated flurries this morning. Highs in the mid 30s. Northwest winds 15 to 20 mph. Gusts up to 35 mph this morning.
TONIGHT
Mostly clear. Near steady temperature in the mid 20s. Southwest winds 10 to 15 mph.
MONDAY
Mostly sunny. Highs in the mid 40s. Southwest winds 10 to 15 mph.
MONDAY NIGHT
Partly cloudy. Lows in the lower 30s. Southwest winds 10 to 15 mph.
TUESDAY
Partly sunny. Highs in the lower 50s. Southwest winds 15 to 20 mph.
TUESDAY NIGHT
Mostly cloudy. Lows in the mid 30s.
WEDNESDAY
Mostly cloudy. A chance of snow in the afternoon. Cooler with highs in the upper 30s. Temperature falling into the lower 30s in the afternoon. Chance of snow 30 percent.
WEDNESDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Much cooler with lows 15 to 20.
THURSDAY
Mostly sunny. Highs in the lower 30s.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy. Lows in the mid 20s. Highs in the mid 30s.
FRIDAY NIGHT AND SATURDAY
Mostly cloudy. Lows around 20. 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 PM EST  1/10/2026
Sunday
11 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 30° 19° Partly Cloudy 5%

0% Thunder
( 2% severe)
WNW   15 67% 21°
Low 24° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 27° 14° Mostly Cloudy WNW   18 63% 17°
High 34° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 25° 11° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NW   20 62% 15°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 26° 13° Partly Cloudy NW   18 66% 17°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 31° 20° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   16 61% 20°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 33° 24° Partly Cloudy WNW   13 57% 20°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 30° 22° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   8 70% 22°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 27° 19° Clear WSW   8 76% 21°
Monday
12 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 28° 19° Clear 0%

0% Thunder
( 0% severe)
SW   9 70% 20°
Low 25° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 28° 18° Clear SW   12 70% 20°
High 45° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 28° 17° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   13 66% 19°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 32° 22° Mostly Cloudy SW   13 65% 22°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 41° 34° Partly Cloudy 0%

0% Thunder
( 0% severe)
WSW   13 57% 27°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 44° 38° Partly Cloudy WSW   12 55% 29°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 39° 33° Partly Cloudy 0%

0% Thunder
( 0% severe)
SW   8 70% 30°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 36° 30° Partly Cloudy SW   8 79% 30°

DECATUR, IL extended weather forecast

Tuesday
13 JAN 2026
Wednesday
14 JAN 2026
Thursday
15 JAN 2026
Friday
16 JAN 2026
Saturday
17 JAN 2026
Low 32° Low 36° Low 13° Low 17° Low 23°
High 53° High 36° High 26° High 37° High 36°
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
15% Rain
Overcast
79% Rain/Snow
Mostly Cloudy
12% Snow
Mostly Cloudy
15% Snow
Overcast
27% Snow
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