DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

5:54 AM CST JAN 14, 2026
Overcast
39°F
Feels Like: 31°F
Dewpoint: 30°F
Rel. Hum.: 70%
Visibility: 10 miles
Wind: WNW at 14 mph
Pressure: 29.71 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Cloudy with scattered flurries this morning, then partly sunny this afternoon. Breezy and much cooler with highs in the mid 30s. Temperature falling into the mid 20s this afternoon. Northwest winds 15 to 25 mph with gusts up to 35 mph.
TONIGHT
Mostly clear. Much cooler with lows around 15. Northwest winds 15 to 20 mph.
THURSDAY
Sunny. Highs in the upper 20s. Northwest winds around 10 mph, becoming west in the afternoon.
THURSDAY NIGHT
Snow likely. Light snow accumulation possible. Lows in the lower 20s. Temperature rising to around 30 after midnight. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of snow 60 percent.
FRIDAY
Partly sunny in the morning, then becoming mostly cloudy. Not as cool with highs in the upper 30s. West winds 15 to 20 mph with gusts up to 30 mph.
FRIDAY NIGHT
Mostly cloudy. A chance of snow showers in the evening. Lows 10 to 15. Chance of snow 30 percent.
SATURDAY
Partly sunny. Much cooler with highs around 20. Wind chill values as low as zero.
SATURDAY NIGHT
Partly cloudy. Lows 5 to 10 above. Wind chill values as low as 10 below after midnight.
SUNDAY THROUGH MARTIN LUTHER KING JR DAY
Mostly cloudy. Highs in the lower 20s. Lows around 10 above. Wind chill values as low as 10 below.
MONDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows 5 to 10 above. Wind chill values as low as 5 below.
TUESDAY
Mostly sunny. Highs in the mid 20s. Wind chill values as low as 5 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  1/13/2026
Wednesday
14 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 42° 36° Mostly Cloudy 2%

0% Thunder
( 0% severe)
W   10 79% 36°
Low 30° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 40° 33° Mostly Cloudy NW   13 82% 35°
High 35° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 36° 26° Mostly Cloudy 3%

0% Thunder
( 2% severe)
NW   16 82% 31°

Mostly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 31° 19° Mostly Cloudy NNW   20 71% 23°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 29° 15° Mostly Cloudy 0%

0% Thunder
( 0% severe)
NNW   22 52% 15°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 28° 14° Mostly Cloudy NNW   21 45% 11°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 24° 11° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   16 48%
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 22° Clear NNW   14 47%
Thursday
15 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 20° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   13 52%
Low 14° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 18° Clear NNW   12 57%
High 27° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 16° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   10 60%

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 18° Clear NW   9 54%
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 23° 14° Partly Cloudy 0%

0% Thunder
( 0% severe)
W   8 43%
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 27° 17° Partly Cloudy WSW   10 36%
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 24° 14° Partly Cloudy 41%
SNOW
1–2.5 in
0% Thunder
( 1% severe)
SSW   9 46%
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 25° 14° Mostly Cloudy S   13 46%

DECATUR, IL extended weather forecast

Friday
16 JAN 2026
Saturday
17 JAN 2026
Sunday
18 JAN 2026
Monday
19 JAN 2026
Tuesday
20 JAN 2026
Low 20° Low 17° Low 5° Low 11° Low 12°
High 37° High 20° High 19° High 27° High 26°
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
Overcast
61% Snow
Overcast
32% Snow
Mostly Cloudy
13% Snow
Mostly Cloudy
13% Snow
Partly Cloudy
13% Snow
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