DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

6:54 AM CDT APR 30, 2026
Clear
39°F
Feels Like: 37°F
Dewpoint: 37°F
Rel. Hum.: 92%
Visibility: 10 miles
Wind: SSW at 3 mph
Pressure: 30.06 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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Snow Depth pages
TODAY
Sunny. Isolated showers this afternoon. Highs in the lower 60s. West winds 5 to 10 mph. Chance of rain 20 percent.
TONIGHT
Mostly cloudy with scattered showers in the evening, then partly cloudy with isolated showers after midnight. Lows in the lower 40s. Northwest winds 5 to 10 mph. Chance of rain 50 percent.
FRIDAY
Sunny. Isolated showers in the afternoon. Highs in the upper 50s. Northwest winds 10 to 15 mph. Chance of rain 20 percent.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 30s. North winds 5 to 10 mph, becoming northeast after midnight.
SATURDAY
Mostly sunny. Highs in the upper 50s. North winds 5 to 10 mph.
SATURDAY NIGHT AND SUNDAY
Mostly clear. Lows in the upper 30s. Highs in the upper 60s.
SUNDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Not as cool with lows in the lower 50s. Chance of rain 60 percent.
MONDAY
Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Breezy with highs in the mid 70s. Chance of rain 50 percent.
MONDAY NIGHT
A chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the lower 50s. Chance of rain 40 percent.
TUESDAY
Mostly sunny. A chance of showers in the morning, then showers likely in the afternoon. Highs around 70. Chance of rain 60 percent.
TUESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows around 50. Chance of rain 60 percent.
WEDNESDAY
Partly sunny with a chance of showers. Highs in the mid 60s. Chance of rain 50 percent.

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  8:00 PM EDT  4/29/2026
Thursday
30 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 44° 40° Clear 0%

0% Thunder
( 0% severe)
NNW   7 68% 34°
Low 40° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 41° 39° Clear NW   3 76% 34°
High 63° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 41° 39° Clear 2%

0% Thunder
( 1% severe)
W   2 79% 35°

Increasing Clouds

Chance of Rain

DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 54° 53° Clear W   6 48% 35°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 60° 58° Partly Cloudy 22%
RAIN
<.01 in
0% Thunder
( 5% severe)
W   10 37% 34°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 61° 59° Mostly Cloudy WSW   12 38% 35°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 58° 56° Mostly Cloudy 50%
RAIN
***
0% Thunder
( 11% severe)
WNW   9 49% 39°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 52° 50° Mostly Cloudy NW   7 69% 42°
Friday
1 MAY 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 48° 45° Mostly Cloudy 17%
RAIN
.1–.25 in
0% Thunder
( 2% severe)
WNW   7 80% 42°
Low 41° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 44° 39° Partly Cloudy NNW   8 82% 39°
High 58° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 42° 37° Clear 2%

0% Thunder
( 0% severe)
NNW   8 82% 37°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 50° 46° Clear NNW   12 54% 34°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 55° 52° Partly Cloudy 2%

0% Thunder
( 3% severe)
NNW   13 41% 32°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 56° 53° Partly Cloudy NNW   13 38% 31°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 54° 51° Partly Cloudy 1%

0% Thunder
( 3% severe)
NNW   10 43% 32°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 47° 44° Partly Cloudy NNE   6 60% 34°

DECATUR, IL extended weather forecast

Saturday
2 MAY 2026
Sunday
3 MAY 2026
Monday
4 MAY 2026
Tuesday
5 MAY 2026
Wednesday
6 MAY 2026
Low 40° Low 39° Low 52° Low 54° Low 47°
High 57° High 69° High 75° High 66° High 62°
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
48% Rain
Partly Cloudy
12% Rain
Overcast
41% Rain
Overcast
65% Rain
Overcast
66% Rain
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