DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

10:54 AM CDT OCT 11, 2026
Clear
66°F
Feels Like: 66°F
Dewpoint: 57°F
Rel. Hum.: 73%
Visibility: 10 miles
Wind: WNW at 3 mph
Pressure: 30.04 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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REST OF TODAY
Sunny. Highs in the lower 80s. North winds around 5 mph, becoming west this afternoon.
TONIGHT
Mostly clear in the evening, then becoming partly cloudy. Not as cool with lows in the lower 60s. South winds 5 to 10 mph.
COLUMBUS DAY
Mostly sunny. Highs around 90. Southwest winds 15 to 20 mph.
MONDAY NIGHT
Clear. Lows around 70. Southwest winds 10 to 15 mph.
TUESDAY
Sunny. Highs in the upper 80s. Southwest winds 10 to 15 mph.
TUESDAY NIGHT
Mostly clear in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 60 percent.
WEDNESDAY
Showers likely, mainly in the morning. Cooler with highs in the upper 70s. Chance of rain 70 percent.
WEDNESDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 50s. Chance of rain 60 percent.
THURSDAY
Showers likely. Highs in the mid 70s. Chance of rain 70 percent.
THURSDAY NIGHT
Mostly cloudy with a chance of showers. Lows in the lower 50s. Chance of rain 50 percent.
FRIDAY
Mostly cloudy in the morning, then becoming partly sunny. Breezy with highs in the mid 60s.
FRIDAY NIGHT AND SATURDAY
Partly cloudy. Lows in the upper 30s. 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 10/11/2026
Sunday
11 OCT 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 77° 79° Clear 0%

0% Thunder
( 0% severe)
NW   1 50% 57°
High 83° DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 82° 81° Clear W   5 38% 54°
Clear



DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 71° 71° Clear 0%

0% Thunder
( 0% severe)
S   5 57% 55°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 63° 63° Clear S   6 78% 56°
Monday
12 OCT 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 62° 61° Partly Cloudy 1%

0% Thunder
( 1% severe)
S   8 81% 56°
Low 60° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 63° 63° Partly Cloudy S   8 81% 57°
High 90° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 63° 63° Partly Cloudy 4%

0% Thunder
( 1% severe)
SSW   8 81% 57°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 77° 79° Partly Cloudy SW   12 56% 60°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 87° 87° Partly Cloudy 4%

0% Thunder
( 2% severe)
SW   14 40% 60°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 89° 88° Clear SW   15 37% 59°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 81° 82° Clear 1%

0% Thunder
( 6% severe)
SSW   10 49% 60°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 75° 75° Clear SSW   12 58% 59°
Tuesday
13 OCT 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 1 AM 74° 74° Clear 0%

0% Thunder
( 16% severe)
SW   12 55% 57°
Low 71° DECATUR, IL 62521 weather forecast Day 3, 3 hours 4 AM 72° 72° Clear SW   12 57% 56°
High 90° DECATUR, IL 62521 weather forecast Day 3, 6 hours 7 AM 71° 71° Clear 1%

0% Thunder
( 12% severe)
SW   12 61% 57°

Clear



DECATUR, IL 62521 weather forecast Day 3, 9 hours 10 AM 80° 81° Clear WSW   14 54% 62°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 1 PM 87° 89° Clear 3%

0% Thunder
( 16% severe)
WSW   13 48% 65°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 4 PM 89° 91° Partly Cloudy WSW   13 44% 64°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 7 PM 81° 83° Clear     SW   7 58% 65°

DECATUR, IL extended weather forecast

Wednesday
14 OCT 2026
Thursday
15 OCT 2026
Friday
16 OCT 2026
Saturday
17 OCT 2026
Sunday
18 OCT 2026
Low 65° Low 52° Low 48° Low 32° Low 29°
High 72° High 69° High 57° High 48° High 52°
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
80% Rain
Overcast
84% Rain
Overcast
79% Rain
Partly Cloudy
16% Rain
Clear
8% Rain/Snow
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