DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

11:54 PM CST NOV 10, 2026
Clear
37°F
Feels Like: 37°F
Dewpoint: 36°F
Rel. Hum.: 96%
Visibility: 10 miles
Wind: Calm
Pressure: 30.02 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TONIGHT
Clear late this evening, then becoming partly cloudy. Lows in the lower 40s. Light and variable winds, becoming southeast around 5 mph.
VETERANS DAY
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 60s. Temperature falling into the upper 50s in the afternoon. South winds 5 to 10 mph, increasing to west 15 to 20 mph in the afternoon. Chance of rain 20 percent.
WEDNESDAY NIGHT
Partly cloudy. Lows in the upper 30s. Northwest winds 10 to 15 mph.
THURSDAY
Partly sunny. Much cooler with highs in the upper 40s. Northwest winds 15 to 20 mph.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Cooler with lows in the upper 20s. Northwest winds 10 to 15 mph.
FRIDAY AND FRIDAY NIGHT
Mostly clear. Highs in the lower 40s. Lows in the mid 20s.
SATURDAY
Sunny. Highs in the mid 40s.
SATURDAY NIGHT AND SUNDAY
Mostly clear. Lows in the upper 20s. Highs in the upper 40s.
SUNDAY NIGHT AND MONDAY
Partly cloudy. Lows in the lower 30s. Highs in the lower 50s.
MONDAY NIGHT AND TUESDAY
Mostly clear. Lows in the lower 30s. Highs in the mid 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  7:00 PM EST 11/10/2026
Wednesday
11 NOV 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 42° 41° Partly Cloudy 1%

0% Thunder
( 0% severe)
  CALM 89% 39°
Low 40° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 41° 39° Partly Cloudy   CALM 96% 40°
High 63° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 42° 39° Mostly Cloudy 21%
RAIN
<.01 in
0% Thunder
( 5% severe)
S   5 96% 41°

Mostly Cloudy

Chance of Rain

DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 53° 50° Partly Cloudy SSW   8 83% 48°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 62° 61° Partly Cloudy 18%
RAIN
.1–.25 in
0% Thunder
( 2% severe)
WSW   12 70% 52°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 61° 59° Mostly Cloudy WNW   15 67% 50°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 52° 47° Mostly Cloudy 3%

0% Thunder
( 0% severe)
NNW   14 83% 47°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 46° 40° Partly Cloudy NNW   13 96% 45°
Thursday
12 NOV 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 42° 36° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   10 100% 42°
Low 38° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 40° 33° Mostly Cloudy NNW   10 100% 40°
High 47° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 39° 32° Mostly Cloudy 4%

0% Thunder
( 1% severe)
NNW   12 96% 38°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 43° 36° Mostly Cloudy NNW   14 86% 39°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 45° 38° Mostly Cloudy 1%

0% Thunder
( 1% severe)
NNW   16 65% 34°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 46° 39° Mostly Cloudy NNW   17 53% 30°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 39° 31° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   13 70% 30°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 35° 27° Partly Cloudy NNW   12 78% 29°

DECATUR, IL extended weather forecast

Friday
13 NOV 2026
Saturday
14 NOV 2026
Sunday
15 NOV 2026
Monday
16 NOV 2026
Tuesday
17 NOV 2026
Low 29° Low 26° Low 27° Low 31° Low 30°
High 44° High 44° High 49° High 49° High 49°
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
Partly Cloudy
14% Rain/Snow
Partly Cloudy
6% Rain/Snow
Clear
6% Rain/Snow
Clear
10% Rain
Clear
10% Rain
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