DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

3:54 AM CDT SEP 26, 2026
Clear
57°F
Feels Like: 58°F
Dewpoint: 52°F
Rel. Hum.: 83%
Visibility: 10 miles
Wind: E at 3 mph
Pressure: 30.18 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Partly sunny. Highs in the mid 70s. East winds 5 to 10 mph.
TONIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 50s. East winds around 5 mph.
SUNDAY
Mostly sunny. Highs in the mid 70s. Northeast winds around 5 mph.
SUNDAY NIGHT
Mostly clear. Lows in the lower 50s. Northeast winds around 5 mph.
MONDAY
Sunny. Highs in the upper 70s. Northeast winds around 5 mph.
MONDAY NIGHT
Mostly clear. Lows in the mid 50s.
TUESDAY
Mostly sunny. Highs around 80.
TUESDAY NIGHT
Mostly cloudy. A chance of showers after midnight. Lows in the lower 60s. Chance of rain 50 percent.
WEDNESDAY AND WEDNESDAY NIGHT
Showers likely. Highs in the mid 70s. Lows in the mid 60s. Chance of rain 60 percent.
THURSDAY
Mostly cloudy with a chance of showers. Highs in the upper 70s. Chance of rain 50 percent.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy. A 50 percent chance of showers. Lows in the lower 60s. Highs in the mid 70s.

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  9/25/2026
Saturday
26 SEP 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 58° 57° Partly Cloudy 1%

0% Thunder
( 1% severe)
ENE   7 69% 48°
Low 53° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 56° 55° Partly Cloudy ENE   6 74% 48°
High 74° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 54° 53° Partly Cloudy 1%

0% Thunder
( 0% severe)
ENE   6 80% 48°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 63° 63° Mostly Cloudy E   8 65% 51°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 70° 70° Partly Cloudy 0%

0% Thunder
( 0% severe)
E   5 45% 48°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 72° 72° Partly Cloudy E   3 39% 46°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 67° 67° Mostly Cloudy 3%

0% Thunder
( 1% severe)
ENE   6 52% 49°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 61° 61° Mostly Cloudy E   6 67% 50°
Sunday
27 SEP 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 59° 59° Partly Cloudy 14%
RAIN
<.01 in
0% Thunder
( 1% severe)
E   5 72% 50°
Low 55° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 57° 57° Partly Cloudy E   3 80% 51°
High 76° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 55° 55° Partly Cloudy 1%

0% Thunder
( 1% severe)
E   3 83% 50°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 64° 65° Partly Cloudy E   5 63% 51°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 71° 71° Partly Cloudy 0%

0% Thunder
( 0% severe)
NE   3 44% 48°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 73° 73° Partly Cloudy NNE   6 40% 47°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 67° 67° Partly Cloudy 0%

0% Thunder
( 1% severe)
NE   7 52% 49°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 60° 60° Partly Cloudy NE   6 72% 51°

DECATUR, IL extended weather forecast

Monday
28 SEP 2026
Tuesday
29 SEP 2026
Wednesday
30 SEP 2026
Thursday
1 OCT 2026
Friday
2 OCT 2026
Low 47° Low 51° Low 59° Low 63° Low 63°
High 79° High 79° High 73° High 81° High 77°
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
9% Rain
Partly Cloudy
21% Rain
Overcast
70% Rain
Overcast
71% Rain
Overcast
62% Rain
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