DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

11:54 PM CST FEB 13, 2026
Clear
37°F
Feels Like: 31°F
Dewpoint: 27°F
Rel. Hum.: 66%
Visibility: 10 miles
Wind: S at 8 mph
Pressure: 30.08 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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REST OF TONIGHT
Mostly clear late this evening, then becoming partly cloudy. Lows in the lower 30s. South winds around 5 mph.
SATURDAY
Cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Highs in the lower 50s. South winds around 5 mph. Chance of rain 50 percent.
SATURDAY NIGHT
Mostly cloudy with a 50 percent chance of rain. Patchy fog after midnight. Lows around 40. Southeast winds 5 to 10 mph.
SUNDAY
Patchy fog in the morning. Mostly sunny. Highs in the upper 50s. Northeast winds 5 to 10 mph.
SUNDAY NIGHT
Mostly clear. Lows in the mid 30s. Northeast winds around 5 mph, becoming south after midnight.
WASHINGTONS BIRTHDAY THROUGH TUESDAY
Mostly cloudy. Highs in the upper 50s. Lows in the lower 40s.
TUESDAY NIGHT AND WEDNESDAY
Mostly cloudy. Lows around 50. Highs in the mid 60s.
WEDNESDAY NIGHT
Mostly cloudy. Lows in the lower 40s.
THURSDAY
Partly sunny. A chance of rain in the afternoon. Highs around 60. Chance of rain 40 percent.
THURSDAY NIGHT
Partly cloudy. A chance of rain in the evening. Lows in the mid 30s. Chance of rain 40 percent.
FRIDAY
Mostly sunny. Cooler with highs in the upper 40s.

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  2/13/2026
Saturday
14 FEB 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 37° 31° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   8 72% 29°
Low 32° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 34° 30° Mostly Cloudy SSW   5 82% 29°
High 52° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 33° 30° Mostly Cloudy 3%

0% Thunder
( 0% severe)
SW   3 85% 29°

Mostly Cloudy

Chance of Rain

DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 40° 38° Mostly Cloudy S   3 73% 32°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 50° 48° Mostly Cloudy 41%
RAIN
<.01 in
0% Thunder
( 1% severe)
S   5 54% 34°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 52° 50° Mostly Cloudy SSE   6 52% 35°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 48° 45° Mostly Cloudy 71%
RAIN
***
0% Thunder
( 2% severe)
SE   6 68% 38°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 44° 41° Mostly Cloudy SE   6 86% 40°
Sunday
15 FEB 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 43° 39° Mostly Cloudy 52%
RAIN
.5–1 in
0% Thunder
( 3% severe)
SE   7 93% 41°
Low 38° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 42° 38° Mostly Cloudy E   6 93% 40°
High 58° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 41° 36° Mostly Cloudy 4%

0% Thunder
( 1% severe)
ENE   7 96% 40°

Decreasing Clouds



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 45° 41° Partly Cloudy NE   7 86% 41°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 53° 51° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNE   7 66% 42°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 57° 56° Clear N   7 55% 41°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 51° 50° Clear 0%

0% Thunder
( 0% severe)
NNW   3 66% 40°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 44° 43° Clear WSW   2 82% 39°

DECATUR, IL extended weather forecast

Monday
16 FEB 2026
Tuesday
17 FEB 2026
Wednesday
18 FEB 2026
Thursday
19 FEB 2026
Friday
20 FEB 2026
Low 34° Low 40° Low 48° Low 43° Low 39°
High 58° High 60° High 68° High 62° High 48°
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
Clear
1% Rain
Mostly Cloudy
5% Rain
Mostly Cloudy
27% Rain
Partly Cloudy
22% Rain
Mostly Cloudy
25% Rain
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