DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

2:54 AM CDT APR 6, 2026
Clear
46°F
Feels Like: 41°F
Dewpoint: 34°F
Rel. Hum.: 63%
Visibility: 10 miles
Wind: SW at 9 mph
Pressure: 30.22 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

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Snow Depth pages
REST OF TONIGHT
Clear. Lows in the upper 30s. Southwest winds 5 to 10 mph with gusts up to 20 mph.
MONDAY
Sunny. Highs in the upper 50s. Northwest winds 10 to 15 mph with gusts up to 25 mph.
MONDAY NIGHT
Mostly cloudy. Lows in the lower 30s. North winds 10 to 15 mph.
TUESDAY
Mostly cloudy. Cooler with highs in the upper 40s. East winds around 10 mph.
TUESDAY NIGHT
Mostly cloudy. Lows in the mid 30s. Southeast winds 10 to 15 mph.
WEDNESDAY
Partly sunny. Not as cool with highs in the upper 60s.
WEDNESDAY NIGHT
Partly cloudy. Not as cool with lows in the lower 50s.
THURSDAY
Partly sunny. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 30 percent.
THURSDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 50s. Chance of rain 60 percent.
FRIDAY AND FRIDAY NIGHT
Mostly cloudy with a chance of showers. Highs in the upper 60s. Lows around 50. Chance of rain 50 percent.
SATURDAY
Partly sunny with a chance of showers. Highs in the lower 70s. Chance of rain 40 percent.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 50s.
SUNDAY
Mostly cloudy with a chance of showers. Highs in the upper 70s. 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/ 5/2026
Monday
6 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 42° 36° Clear 0%

0% Thunder
( 0% severe)
WSW   9 73% 34°
Low 40° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 42° 36° Clear WSW   10 73% 34°
High 57° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 41° 34° Clear 1%

0% Thunder
( 0% severe)
NW   12 79% 35°

Clear



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 48° 43° Clear NNW   13 58% 34°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 54° 50° Clear 4%

0% Thunder
( 0% severe)
NW   14 43% 32°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 56° 52° Clear NW   15 35% 29°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 52° 48° Mostly Cloudy 8%

0% Thunder
( 1% severe)
NW   13 39% 28°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 45° 40° Mostly Cloudy NNW   10 51% 28°
Tuesday
7 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 41° 34° Mostly Cloudy 8%

0% Thunder
( 1% severe)
N   12 54% 26°
Low 33° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 36° 28° Mostly Cloudy NNE   12 60% 24°
High 48° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 33° 25° Mostly Cloudy 3%

0% Thunder
( 1% severe)
NE   10 68% 24°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 37° 30° Mostly Cloudy E   10 55% 23°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 42° 36° Mostly Cloudy 1%

0% Thunder
( 1% severe)
E   10 46% 23°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 46° 41° Mostly Cloudy E   10 39% 23°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 45° 40° Mostly Cloudy 3%

0% Thunder
( 3% severe)
ESE   9 43% 24°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 41° 35° Mostly Cloudy ESE   10 54% 26°

DECATUR, IL extended weather forecast

Wednesday
8 APR 2026
Thursday
9 APR 2026
Friday
10 APR 2026
Saturday
11 APR 2026
Sunday
12 APR 2026
Low 36° Low 49° Low 51° Low 52° Low 53°
High 64° High 70° High 68° High 67° High 72°
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
8% Rain
Overcast
30% Rain
Overcast
52% Rain
Overcast
74% Rain
Overcast
59% Rain
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