DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

3:54 AM CDT APR 24, 2026
Scattered Clouds
66°F
Feels Like: 66°F
Dewpoint: 57°F
Rel. Hum.: 73%
Visibility: 10 miles
Wind: S at 15 mph
Pressure:
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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Snow Depth pages
TODAY
Mostly cloudy with a chance of thunderstorms. Showers, mainly this morning. Highs in the mid 70s. South winds around 15 mph, becoming west this afternoon. Chance of rain 80 percent.
TONIGHT
Mostly cloudy in the evening, then clearing. Cooler with lows in the upper 40s. North winds 5 to 10 mph.
SATURDAY
Sunny. Highs in the mid 70s. Northeast winds 10 to 15 mph.
SATURDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. Northeast winds around 10 mph.
SUNDAY
Mostly sunny. Highs in the mid 70s. East winds 10 to 15 mph.
SUNDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the upper 50s. Chance of rain 30 percent.
MONDAY
Showers likely with a chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. Breezy with highs in the mid 70s. Chance of rain 80 percent.
MONDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then partly cloudy after midnight. Breezy with lows in the lower 50s. Chance of rain 70 percent.
TUESDAY THROUGH WEDNESDAY
Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
WEDNESDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent.
THURSDAY
Partly sunny with a 40 percent chance of showers. Highs in the mid 60s.

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  4/23/2026
Friday
24 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 68° 68° Mostly Cloudy 69%
RAIN
***
0% Thunder
( 28% severe)
S   16 65% 56°
Low 61° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 66° 66° Mostly Cloudy S   16 70% 56°
High 75° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 62° 60° Mostly Cloudy 61%
RAIN
.1–.25 in
0% Thunder
( 16% severe)
S   15 84% 57°

Mostly Cloudy

Rain Likely

DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 66° 66° Mostly Cloudy SSW   14 78% 59°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 71° 71° Mostly Cloudy 46%
RAIN
***
0% Thunder
( 18% severe)
WSW   13 66% 59°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 73° 73° Mostly Cloudy W   12 57% 57°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 70° 70° Mostly Cloudy 9%

0% Thunder
( 6% severe)
WNW   9 59% 55°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 63° 63° Mostly Cloudy N   8 70% 53°
Saturday
25 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 58° 56° Partly Cloudy 1%

0% Thunder
( 1% severe)
N   8 75% 50°
Low 51° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 54° 52° Clear N   8 77% 47°
High 74° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 52° 49° Clear 1%

0% Thunder
( 1% severe)
NNE   9 80% 46°

Clear



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 63° 62° Clear NE   10 60% 49°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 70° 70° Clear 1%

0% Thunder
( 1% severe)
NNE   12 44% 47°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 73° 73° Clear NNE   12 35% 44°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 68° 68° Partly Cloudy 1%

0% Thunder
( 1% severe)
NE   12 40% 43°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 58° 56° Partly Cloudy NE   12 55% 42°

DECATUR, IL extended weather forecast

Sunday
26 APR 2026
Monday
27 APR 2026
Tuesday
28 APR 2026
Wednesday
29 APR 2026
Thursday
30 APR 2026
Low 45° Low 57° Low 55° Low 45° Low 42°
High 73° High 76° High 65° High 65° 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
Clear
8% Rain
Overcast
73% Rain
Overcast
74% Rain
Partly Cloudy
30% Rain
Mostly Cloudy
20% Rain
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