DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

6:54 AM CDT JUN 12, 2026
Clear
66°F
Feels Like: 66°F
Dewpoint: 61°F
Rel. Hum.: 84%
Visibility: 10 miles
Wind: NW at 3 mph
Pressure: 29.96 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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Snow Depth pages
TODAY
Not as warm. Sunny. Highs in the upper 70s. West winds 5 to 10 mph.
TONIGHT
Mostly clear. Lows around 60. West winds up to 5 mph shifting to the south around 5 mph after midnight.
SATURDAY
Sunny with slight chance of thunderstorms in the morning, then partly sunny with chance of thunderstorms in the afternoon. Highs in the lower 80s. South winds 5 to 15 mph. Chance of thunderstorms 50 percent.
SATURDAY NIGHT
Showers likely and chance of thunderstorms in the evening, then showers after midnight. Lows in the lower 60s. Southwest winds 5 to 15 mph. Chance of precipitation 90 percent.
SUNDAY
Cooler. Partly sunny in the morning then clearing. Highs in the lower 70s. Northwest winds 15 to 20 mph.
SUNDAY NIGHT AND MONDAY
Partly cloudy. Lows in the mid 50s. Highs in the mid 70s.
MONDAY NIGHT
Mostly clear. Lows in the mid 50s.
TUESDAY
Sunny. A 30 percent chance of thunderstorms in the afternoon. Highs in the upper 70s.
TUESDAY NIGHT
Partly cloudy. Chance of thunderstorms in the evening. Lows in the upper 50s. Chance of thunderstorms 40 percent.
WEDNESDAY
Partly sunny. Chance of showers in the morning, then chance of thunderstorms in the afternoon. Highs around 80. Chance of precipitation 50 percent.
WEDNESDAY NIGHT
Breezy. Showers likely and chance of thunderstorms in the evening, then chance of showers after midnight. Lows in the mid 60s. Chance of precipitation 70 percent.
THURSDAY
Breezy. Mostly sunny. Chance of showers in the morning, then chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of precipitation 50 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  6/11/2026
Friday
12 JUN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 67° 67° Mostly Cloudy 3%

0% Thunder
( 4% severe)
WNW   12 87% 63°
Low 61° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 62° 61° Partly Cloudy WNW   9 90% 59°
High 79° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 63° 63° Partly Cloudy 0%

0% Thunder
( 1% severe)
W   7 87% 59°

Clear



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 72° 72° Clear WNW   9 64% 59°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 76° 78° Clear 0%

0% Thunder
( 2% severe)
WNW   10 56% 59°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 79° 80° Clear WNW   10 50% 59°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 78° 80° Clear 0%

0% Thunder
( 2% severe)
WNW   6 56% 61°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 68° 68° Clear S   2 76% 60°
Saturday
13 JUN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 64° 65° Partly Cloudy 1%

0% Thunder
( 2% severe)
S   3 84% 59°
Low 61° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 63° 64° Partly Cloudy S   5 84% 58°
High 81° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 66° 66° Partly Cloudy 3%

0% Thunder
( 13% severe)
S   8 81% 60°

Partly Cloudy

Chance of Rain

DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 76° 78° Partly Cloudy S   12 66% 64°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 79° 81° Partly Cloudy 26%
RAIN
***
0% Thunder
( 35% severe)
S   15 60% 64°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 80° 82° Mostly Cloudy SSW   15 58% 64°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 78° 80° Partly Cloudy 53%
RAIN
***
0% Thunder
( 39% severe)
SSW   13 64% 65°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 72° 72° Mostly Cloudy WSW   9 81% 66°

DECATUR, IL extended weather forecast

Sunday
14 JUN 2026
Monday
15 JUN 2026
Tuesday
16 JUN 2026
Wednesday
17 JUN 2026
Thursday
18 JUN 2026
Low 64° Low 54° Low 56° Low 64° Low 69°
High 72° High 78° High 79° High 78° High 84°
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
37% Rain
Mostly Cloudy
16% Rain
Partly Cloudy
24% Rain
Mostly Cloudy
39% Rain
Mostly Cloudy
45% Rain
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