DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

2:54 AM CDT OCT 16, 2025
Clear
54°F
Feels Like: 52°F
Dewpoint: 52°F
Rel. Hum.: 93%
Visibility: 9 miles
Wind: NE at 7 mph
Pressure: 30.16 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

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REST OF TONIGHT
Partly cloudy. Near steady temperature in the upper 50s. East winds 5 to 10 mph.
THURSDAY
Mostly sunny. Highs in the upper 70s. East winds around 10 mph.
THURSDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. Southeast winds around 10 mph.
FRIDAY
Partly sunny. Highs around 80. South winds 10 to 15 mph.
FRIDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the lower 60s. South winds 10 to 15 mph. Chance of rain 40 percent.
SATURDAY AND SATURDAY NIGHT
Showers with a chance of thunderstorms. Highs in the upper 70s. Lows in the upper 40s. Chance of rain 90 percent.
SUNDAY
Sunny. A chance of showers in the morning. Breezy and much cooler with highs in the lower 60s. Chance of rain 30 percent.
SUNDAY NIGHT AND MONDAY
Clear. Lows in the lower 40s. Highs in the upper 60s.
MONDAY NIGHT AND TUESDAY
Partly cloudy. A 30 percent chance of showers. Lows around 50. Highs in the upper 60s.
TUESDAY NIGHT AND WEDNESDAY
Mostly clear. Lows in the lower 40s. Highs in the lower 60s.

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 10/15/2025
Thursday
16 OCT 2025
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 60° 59° Partly Cloudy 4%

0% Thunder
( 2% severe)
ENE   8 84% 55°
Low 56° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 58° 56° Partly Cloudy E   9 83% 53°
High 79° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 57° 55° Partly Cloudy 5%

0% Thunder
( 1% severe)
E   8 77% 50°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 66° 66° Partly Cloudy ESE   10 61% 52°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 74° 74° Partly Cloudy 4%

0% Thunder
( 1% severe)
ESE   9 48% 53°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 77° 78° Clear ESE   10 43% 53°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 69° 69° Clear 4%

0% Thunder
( 2% severe)
ESE   9 57% 53°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 63° 62° Partly Cloudy SE   9 70% 53°
Friday
17 OCT 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 61° 60° Partly Cloudy 5%

0% Thunder
( 3% severe)
SSE   9 70% 51°
Low 55° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 59° 57° Partly Cloudy SSE   10 69% 49°
High 80° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 56° 53° Partly Cloudy 2%

0% Thunder
( 2% severe)
SSE   10 69% 46°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 67° 67° Mostly Cloudy S   13 50% 48°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 76° 78° Mostly Cloudy 2%

0% Thunder
( 2% severe)
S   14 37% 48°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 79° 79° Mostly Cloudy S   15 35% 49°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 72° 72° Mostly Cloudy 3%

0% Thunder
( 3% severe)
SSE   13 48% 51°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 66° 66° Partly Cloudy S   12 61% 52°

DECATUR, IL extended weather forecast

Saturday
18 OCT 2025
Sunday
19 OCT 2025
Monday
20 OCT 2025
Tuesday
21 OCT 2025
Wednesday
22 OCT 2025
Low 61° Low 51° Low 38° Low 44° Low 41°
High 84° High 60° High 72° High 63° High 60°
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
Mostly Cloudy
80% Rain
Mostly Cloudy
86% Rain
Clear
2% Rain
Partly Cloudy
63% Rain
Partly Cloudy
15% Rain
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