DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

1:54 AM CDT JUL 6, 2026
Clear
68°F
Feels Like: 68°F
Dewpoint: 66°F
Rel. Hum.: 93%
Visibility: 7 miles
Wind: NNE at 6 mph
Pressure: 29.99 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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REST OF TONIGHT
Partly cloudy. Near steady temperature in the upper 60s. North winds around 5 mph.
MONDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. North winds 5 to 10 mph. Chance of rain 30 percent.
MONDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 30 percent.
TUESDAY
Mostly sunny. Highs in the mid 80s. Northeast winds 5 to 10 mph.
TUESDAY NIGHT
Mostly clear. Lows in the mid 60s. East winds around 5 mph.
WEDNESDAY AND WEDNESDAY NIGHT
Mostly clear. Highs in the mid 80s. Lows in the upper 60s.
THURSDAY
Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows around 70. Chance of rain 60 percent.
FRIDAY
Partly sunny with a chance of showers in the morning, then showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 70 percent.
FRIDAY NIGHT
A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 50 percent.
SATURDAY
Partly sunny with a chance of showers. Highs in the mid 80s. Chance of rain 40 percent.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers in the evening. Lows in the mid 60s. Chance of rain 30 percent.
SUNDAY
Mostly sunny. Highs in the mid 80s.

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  7/ 5/2026
Monday
6 JUL 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 69° 69° Partly Cloudy 2%

0% Thunder
( 3% severe)
NNE   6 97% 68°
Low 66° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 67° 67° Mostly Cloudy N   7 97% 66°
High 82° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 69° 69° Mostly Cloudy 12%
RAIN
<.01 in
0% Thunder
( 14% severe)
N   8 93% 67°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 75° 75° Mostly Cloudy NNE   9 79% 68°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 79° 82° Mostly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 33% severe)
NNE   9 72% 69°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 80° 83° Mostly Cloudy NNE   10 69% 69°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 79° 81° Partly Cloudy 3%

0% Thunder
( 13% severe)
NNE   12 69% 68°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 71° 71° Partly Cloudy NNE   7 87% 67°
Tuesday
7 JUL 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 68° 68° Partly Cloudy 1%

0% Thunder
( 2% severe)
NE   6 90% 65°
Low 64° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 66° 66° Partly Cloudy NNE   6 93% 64°
High 83° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 68° 68° Partly Cloudy 1%

0% Thunder
( 3% severe)
NE   7 90% 65°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 76° 77° Partly Cloudy NE   7 76% 68°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 81° 84° Partly Cloudy 4%

0% Thunder
( 9% severe)
NE   9 65% 68°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 82° 85° Partly Cloudy NE   9 63% 68°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 81° 84° Partly Cloudy 0%

0% Thunder
( 6% severe)
NE   7 65% 68°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 72° 72° Partly Cloudy ENE   3 84% 67°

DECATUR, IL extended weather forecast

Wednesday
8 JUL 2026
Thursday
9 JUL 2026
Friday
10 JUL 2026
Saturday
11 JUL 2026
Sunday
12 JUL 2026
Low 66° Low 69° Low 74° Low 70° Low 72°
High 88° High 91° High 89° High 85° High 91°
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
11% Rain
Partly Cloudy
36% Rain
Overcast
64% Rain
Overcast
62% Rain
Mostly Cloudy
32% Rain
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