DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

12:54 AM CDT APR 22, 2026
Few Clouds
64°F
Feels Like: 63°F
Dewpoint: 50°F
Rel. Hum.: 60%
Visibility: 10 miles
Wind: SW at 12 mph
Pressure: 29.98 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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REST OF TONIGHT
Partly cloudy with a slight chance of showers and thunderstorms. Not as cool with lows in the upper 50s. Southwest winds 10 to 15 mph. Chance of rain 20 percent.
WEDNESDAY
Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent.
WEDNESDAY NIGHT
Mostly clear. Lows in the upper 50s. Southwest winds 5 to 10 mph.
THURSDAY
Sunny, breezy with highs around 80. South winds 15 to 25 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.
FRIDAY
A chance of thunderstorms. Showers. Highs in the mid 70s. Chance of rain 70 percent.
FRIDAY NIGHT
Partly cloudy in the evening, then clearing. Cooler with lows in the lower 50s.
SATURDAY
Sunny. Highs in the lower 70s.
SATURDAY NIGHT
Mostly clear in the evening, then becoming mostly cloudy. Lows in the upper 40s.
SUNDAY
Partly sunny. Highs in the mid 70s.
SUNDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of rain 50 percent.
MONDAY
Showers likely with a chance of thunderstorms. Breezy with highs in the mid 70s. Chance of rain 60 percent.
MONDAY NIGHT
Mostly cloudy with a chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Breezy with lows in the upper 40s. Chance of rain 40 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  4/21/2026
Wednesday
22 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 64° 63° Partly Cloudy 20%
RAIN
<.01 in
0% Thunder
( 20% severe)
WSW   13 65% 52°
Low 59° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 62° 60° Partly Cloudy WSW   13 75% 54°
High 77° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 60° 58° Partly Cloudy 6%

0% Thunder
( 10% severe)
WSW   12 81% 54°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 67° 67° Partly Cloudy WSW   13 68% 56°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 74° 74° Partly Cloudy 6%

0% Thunder
( 22% severe)
WSW   12 55% 57°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 77° 79° Partly Cloudy SW   12 50% 57°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 74° 74° Partly Cloudy 3%

0% Thunder
( 6% severe)
SW   9 51% 55°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 66° 66° Partly Cloudy S   8 70% 56°
Thursday
23 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 62° 61° Partly Cloudy 1%

0% Thunder
( 2% severe)
S   9 78% 55°
Low 57° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 59° 57° Partly Cloudy S   9 80% 53°
High 80° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 58° 56° Partly Cloudy 0%

0% Thunder
( 2% severe)
S   10 83% 53°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 70° 70° Clear S   15 57% 54°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 77° 78° Partly Cloudy 1%

0% Thunder
( 8% severe)
S   20 43% 53°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 79° 79° Partly Cloudy S   21 39% 52°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 75° 75° Partly Cloudy 6%

0% Thunder
( 7% severe)
S   17 46% 53°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 68° 68° Partly Cloudy S   16 61% 54°

DECATUR, IL extended weather forecast

Friday
24 APR 2026
Saturday
25 APR 2026
Sunday
26 APR 2026
Monday
27 APR 2026
Tuesday
28 APR 2026
Low 61° Low 48° Low 45° Low 52° Low 53°
High 74° High 70° High 70° High 70° High 70°
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
72% Rain
Clear
10% Rain
Partly Cloudy
16% Rain
Overcast
64% Rain
Overcast
53% Rain
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