DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

6:54 PM CST FEB 9, 2026
Clear
36°F
Feels Like: 30°F
Dewpoint: 27°F
Rel. Hum.: 69%
Visibility: 10 miles
Wind: SSE at 8 mph
Pressure: 30.02 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Partly cloudy this evening, then clearing. Not as cool with lows in the lower 30s. Temperature rising into the upper 30s after midnight. South winds 10 to 15 mph.
TUESDAY
Sunny. Highs in the lower 50s. West winds 10 to 15 mph, becoming northwest in the afternoon.
TUESDAY NIGHT
Mostly clear. Lows in the mid 20s. Northwest winds 5 to 10 mph.
WEDNESDAY
Sunny. Highs in the mid 40s. Northwest winds 5 to 10 mph.
WEDNESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 20s. North winds around 5 mph, becoming northeast after midnight.
THURSDAY
Cloudy. Highs in the lower 40s.
THURSDAY NIGHT THROUGH FRIDAY NIGHT
Mostly cloudy. Lows in the upper 20s. Highs in the lower 40s.
SATURDAY
Cloudy with a 50 percent chance of rain. Highs in the mid 40s.
SATURDAY NIGHT
Rain likely. Lows in the lower 30s. Chance of rain 70 percent.
SUNDAY
Mostly cloudy in the morning, then becoming mostly sunny. A 50 percent chance of rain. Highs in the upper 40s.
SUNDAY NIGHT AND WASHINGTONS BIRTHDAY
Partly cloudy. Lows around 30. Highs around 50.

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 AM EST  2/ 9/2026
Monday
9 FEB 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 37° 32° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   6 58% 24°
High 43° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 42° 38° Mostly Cloudy S   7 60% 29°
Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 37° 31° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSE   8 75% 30°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 36° 28° Partly Cloudy S   12 82% 31°
Tuesday
10 FEB 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 38° 30° Partly Cloudy 1%

0% Thunder
( 1% severe)
S   12 85% 34°
Low 33° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 40° 33° Partly Cloudy SSW   12 82% 35°
High 51° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 40° 33° Partly Cloudy 1%

0% Thunder
( 1% severe)
WSW   10 89% 37°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 44° 38° Partly Cloudy NW   10 79% 38°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 50° 46° Partly Cloudy 1%

0% Thunder
( 0% severe)
NW   12 66% 39°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 50° 46° Partly Cloudy NW   12 56% 35°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 42° 36° Clear 2%

0% Thunder
( 0% severe)
NW   9 67% 32°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 37° 30° Partly Cloudy NW   9 72% 29°
Wednesday
11 FEB 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM 34° 27° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   9 75% 27°
Low 26° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM 31° 23° Partly Cloudy NNW   9 77% 25°
High 43° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM 29° 21° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   8 80% 24°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 32° 24° Partly Cloudy NNW   9 71% 24°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 39° 33° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   9 56% 25°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 42° 36° Partly Cloudy NW   9 50% 25°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 37° 33° Partly Cloudy     NW   5 61% 25°

DECATUR, IL extended weather forecast

Thursday
12 FEB 2026
Friday
13 FEB 2026
Saturday
14 FEB 2026
Sunday
15 FEB 2026
Monday
16 FEB 2026
Low 26° Low 28° Low 30° Low 32° Low 36°
High 43° High 42° High 46° High 48° High 55°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Mostly Cloudy
11% Snow
Overcast
44% Rain/Snow
Overcast
24% Rain
Partly Cloudy
15% Rain
Partly Cloudy
20% Rain
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