DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

4:54 PM CDT OCT 23, 2025
Clear
57°F
Feels Like: 54°F
Dewpoint: 30°F
Rel. Hum.: 35%
Visibility: 10 miles
Wind: WNW at 12 mph, gusts to 24
Pressure: 30.16 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Clear. Widespread frost after midnight. Lows in the lower 30s. Northwest winds 5 to 10 mph, becoming north after midnight.
FRIDAY
Widespread frost in the morning. Sunny. Highs in the lower 60s. Northeast winds around 5 mph.
FRIDAY NIGHT
Mostly cloudy. Not as cool with lows in the lower 40s. East winds around 5 mph.
SATURDAY
Mostly cloudy. Highs in the upper 50s. Southeast winds 5 to 10 mph.
SATURDAY NIGHT
Mostly cloudy with a 30 percent chance of showers. Lows in the upper 40s. East winds 5 to 10 mph.
SUNDAY
Mostly cloudy. A chance of showers in the afternoon. Highs around 60. Chance of rain 30 percent.
SUNDAY NIGHT
Mostly cloudy with a 40 percent chance of showers. Lows in the mid 40s.
MONDAY
Mostly cloudy in the morning, then becoming partly sunny. Highs around 60.
MONDAY NIGHT AND TUESDAY
Mostly cloudy. A 40 percent chance of showers. Lows in the mid 40s. Highs in the lower 60s.
TUESDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.
WEDNESDAY
Partly sunny with a 40 percent chance of showers. Highs in the upper 50s.
WEDNESDAY NIGHT AND THURSDAY
Partly cloudy. Lows around 40. Highs in the upper 50s.

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 AM EDT 10/23/2025
Thursday
23 OCT 2025
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 56° 53° Clear 0%

0% Thunder
( 0% severe)
WNW   12 38% 31°
High 60° DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 59° 57° Clear WNW   13 34% 31°
Clear



DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 50° 47° Clear 0%

0% Thunder
( 0% severe)
WNW   7 50% 32°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 43° 42° Clear NW   2 68% 33°
Friday
24 OCT 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 39° 37° Clear 0%

0% Thunder
( 0% severe)
NNW   1 79% 33°
Low 34° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 36° 34° Clear N   1 85% 32°
High 61° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 35° 33° Clear 0%

0% Thunder
( 0% severe)
NNE   1 85% 31°

Increasing Clouds



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 49° 49° Clear ENE   1 58% 35°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 58° 58° Partly Cloudy 1%

0% Thunder
( 0% severe)
N   3 40% 34°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 60° 61° Mostly Cloudy NNW   3 36% 33°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 52° 52° Mostly Cloudy 2%

0% Thunder
( 1% severe)
ENE   3 52% 35°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 47° 45° Mostly Cloudy ESE   5 63% 35°
Saturday
25 OCT 2025
DECATUR, IL 62521 weather forecast Day 3, 0 hours 1 AM 44° 41° Mostly Cloudy 2%

0% Thunder
( 1% severe)
ESE   5 70% 35°
Low 41° DECATUR, IL 62521 weather forecast Day 3, 3 hours 4 AM 43° 39° Mostly Cloudy ESE   6 73% 35°
High 59° DECATUR, IL 62521 weather forecast Day 3, 6 hours 7 AM 44° 40° Mostly Cloudy 5%

0% Thunder
( 2% severe)
ESE   7 70% 35°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 10 AM 51° 48° Mostly Cloudy ESE   9 61% 38°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 1 PM 57° 55° Mostly Cloudy 11%
RAIN
<.01 in
0% Thunder
( 2% severe)
ESE   10 49% 38°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 4 PM 58° 56° Mostly Cloudy ESE   10 47% 38°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 7 PM 53° 50° Mostly Cloudy     ESE   9 59% 39°

DECATUR, IL extended weather forecast

Sunday
26 OCT 2025
Monday
27 OCT 2025
Tuesday
28 OCT 2025
Wednesday
29 OCT 2025
Thursday
30 OCT 2025
Low 43° Low 43° Low 43° Low 40° Low 36°
High 61° High 59° High 57° High 55° High 54°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
68% Rain
Overcast
70% Rain
Overcast
28% Rain
Overcast
53% Rain
Mostly Cloudy
24% Rain
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