DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

1:54 AM CST FEB 17, 2026
Clear
46°F
Feels Like: 40°F
Dewpoint: 39°F
Rel. Hum.: 76%
Visibility: 10 miles
Wind: S at 12 mph
Pressure: 29.97 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TONIGHT
Partly cloudy. Patchy fog. Near steady temperature in the lower 40s. South winds 5 to 10 mph with gusts up to 20 mph.
TUESDAY
Cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the upper 50s. South winds 15 to 20 mph. Gusts up to 40 mph in the afternoon. Chance of rain 20 percent.
TUESDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Breezy and not as cool. Near steady temperature in the mid 50s. South winds 20 to 25 mph with gusts up to 45 mph. Chance of rain 40 percent.
WEDNESDAY
Sunny. Highs in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 40s. South winds 5 to 10 mph.
THURSDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 50 percent.
THURSDAY NIGHT
Partly cloudy with a chance of showers in the evening, then mostly clear after midnight. Cooler with lows in the mid 30s. Chance of rain 40 percent.
FRIDAY AND FRIDAY NIGHT
Mostly clear and breezy. Highs in the mid 40s. Lows in the mid 20s.
SATURDAY AND SATURDAY NIGHT
Partly cloudy. Highs in the lower 40s. Lows in the mid 20s.
SUNDAY
Mostly sunny. Highs in the mid 30s.
SUNDAY NIGHT AND MONDAY
Mostly clear. Lows 15 to 20. Highs in the mid 30s.

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  2/16/2026
Tuesday
17 FEB 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 45° 40° Mostly Cloudy 0%

0% Thunder
( 0% severe)
S   10 82% 40°
Low 40° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 42° 36° Partly Cloudy S   9 89% 39°
High 58° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 41° 35° Mostly Cloudy 1%

0% Thunder
( 0% severe)
S   9 89% 38°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 47° 42° Mostly Cloudy S   12 83% 42°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 53° 48° Mostly Cloudy 3%

0% Thunder
( 1% severe)
S   15 74% 45°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 56° 52° Mostly Cloudy SSE   17 72% 47°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 55° 51° Mostly Cloudy 13%
RAIN
<.01 in
0% Thunder
( 2% severe)
S   17 77% 48°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 56° 51° Mostly Cloudy S   21 80% 50°
Wednesday
18 FEB 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 56° 51° Mostly Cloudy 32%
RAIN
<.01 in
0% Thunder
( 5% severe)
S   21 80% 50°
Low 51° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 55° 50° Mostly Cloudy SSW   20 83% 50°
High 68° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 55° 50° Partly Cloudy 4%

0% Thunder
( 0% severe)
SW   18 83% 50°

Clear




Breezy
DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 59° 56° Clear WSW   18 64% 47°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 66° 66° Clear 0%

0% Thunder
( 0% severe)
WSW   18 36% 38°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 67° 67° Clear WSW   16 28% 33°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 59° 58° Clear 7%

0% Thunder
( 0% severe)
SSW   8 39% 34°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 51° 48° Mostly Cloudy S   7 56% 36°

DECATUR, IL extended weather forecast

Thursday
19 FEB 2026
Friday
20 FEB 2026
Saturday
21 FEB 2026
Sunday
22 FEB 2026
Monday
23 FEB 2026
Low 42° Low 35° Low 24° Low 21° Low 17°
High 66° High 42° High 38° High 28° High 34°
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
24% Rain
Partly Cloudy
25% Rain/Snow
Partly Cloudy
27% Snow
Mostly Cloudy
20% Snow
Partly Cloudy
10% Snow
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