DECATUR, IL 62521 Weather Forecast & Current Conditions
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  62521 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

DECATUR, IL
Current Weather
6:54 AM CDT APR 13, 2026
Few Clouds
66°F
Feels Like: 66°F
Dewpoint: 61°F
Rel. Hum.: 84%
Visibility: 10 miles
Wind: SSW at 13 mph
Pressure: 29.97 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  62521 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

DECATUR, IL 62521
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
REST OF TODAY
Partly sunny. A slight chance of showers and thunderstorms this afternoon. Highs in the lower 80s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 20 percent.
TONIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 20 percent.
TUESDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 40 percent.
TUESDAY NIGHT
A chance of thunderstorms in the evening. Showers likely. Lows in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
WEDNESDAY
Showers with a chance of thunderstorms. Highs in the upper 70s. Southwest winds 15 to 20 mph. Chance of rain 90 percent.
WEDNESDAY NIGHT
A chance of thunderstorms in the evening. Showers. Lows in the lower 60s. Chance of rain 90 percent.
THURSDAY
Partly sunny in the morning, then clearing. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50 percent.
THURSDAY NIGHT
Mostly clear. Lows in the upper 50s.
FRIDAY
Mostly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 30 percent.
FRIDAY NIGHT
Mostly cloudy. A chance of showers in the evening, then showers with a chance of thunderstorms after midnight. Lows around 60. Chance of rain 80 percent.
SATURDAY
Showers likely in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Cooler with highs in the lower 70s. Chance of rain 70 percent.
SATURDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Much cooler with lows in the lower 40s. Chance of rain 50 percent.
SUNDAY
Sunny, cooler with highs around 60.

  62521 WEATHER SATELLITE LOOPS
Visible Weather Satellite
DECATUR, IL 62521
Infrared Weather Satellite
DECATUR, IL 62521
  62521 WEATHER RADAR LOOP
NEXRAD Weather Radar
DECATUR, IL 62521
 MOS COMPUTER WEATHER FORECAST

DECATUR, IL 3 hourly weather forecast
weather forecast created  8:00 PM EDT  4/12/2026
Monday
13 APR 2026		 DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 66° 66° Mostly Cloudy 37%
RAIN
.01–.1 in		 0% Thunder
( 21% severe)		 SW   18 75% 58°
Low 64° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 65° 65° Mostly Cloudy SW   16 81% 59°
High 82° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 65° 65° Mostly Cloudy 8%

 0% Thunder
( 19% severe)		 SSW   14 84% 60°

Mostly Cloudy




Breezy		 DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 71° 71° Mostly Cloudy SW   15 76% 63°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 77° 79° Partly Cloudy 19%
RAIN
<.01 in		 0% Thunder
( 24% severe)		 SSW   17 64% 64°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 80° 81° Mostly Cloudy S   20 56% 63°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 76° 78° Partly Cloudy 22%
RAIN
<.01 in		 0% Thunder
( 18% severe)		 S   17 62% 62°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 72° 72° Partly Cloudy SSW   18 71% 62°
Tuesday
14 APR 2026		 DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 70° 70° Partly Cloudy 16%
RAIN
<.01 in		 0% Thunder
( 12% severe)		 SSW   17 76% 62°
Low 66° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 68° 68° Partly Cloudy SSW   16 78% 61°
High 84° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 66° 66° Mostly Cloudy 21%
RAIN
.01–.1 in		 0% Thunder
( 21% severe)		 SSW   15 87% 62°

Mostly Cloudy

Chance of Rain


Breezy		 DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 73° 73° Mostly Cloudy SSW   17 73% 64°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 79° 81° Mostly Cloudy 38%
RAIN
1–2 in		 0% Thunder
( 42% severe)		 SSW   18 60% 64°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 83° 84° Partly Cloudy SSW   20 53% 64°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 78° 80° Mostly Cloudy 38%
RAIN
***		 0% Thunder
( 26% severe)		 SSW   18 58% 62°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 73° 73° Partly Cloudy SSW   17 68% 62°

DECATUR, IL extended weather forecast
Wednesday
15 APR 2026		 Thursday
16 APR 2026		 Friday
17 APR 2026		 Saturday
18 APR 2026		 Sunday
19 APR 2026
Low 63° Low 57° Low 54° Low 59° Low 36°
High 76° High 80° High 77° High 70° High 58°
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
69% Rain		 Mostly Cloudy
75% Rain		 Mostly Cloudy
36% Rain		 Overcast
57% Rain		 Partly Cloudy
23% Rain
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