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 12, 2026
Clear
61°F
Feels Like: 59°F
Dewpoint: 55°F
Rel. Hum.: 81%
Visibility: 10 miles
Wind: S at 12 mph
Pressure: 30.08 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
TODAY
Partly sunny this morning, then mostly cloudy with a slight chance of showers this afternoon. Breezy, warmer with highs around 80. South winds 15 to 25 mph with gusts up to 40 mph. Chance of rain 20 percent.
TONIGHT
Showers likely. A slight chance of thunderstorms in the evening, then a chance of thunderstorms after midnight. Breezy with lows in the lower 60s. Southwest winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent.
MONDAY
Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny in the afternoon. Highs in the lower 80s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 40 percent.
MONDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 60s. South winds 15 to 20 mph with gusts up to 30 mph.
TUESDAY
Partly sunny with a chance of showers and thunderstorms. Highs in the lower 80s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.
TUESDAY NIGHT
Showers and thunderstorms likely in the evening, then showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 60 percent.
WEDNESDAY
Showers likely in the morning, then showers with a chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 90 percent.
WEDNESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then showers likely after midnight. Lows in the lower 60s. Chance of rain 70 percent.
THURSDAY
Mostly cloudy in the morning, then becoming mostly sunny. A chance of showers. Highs around 80. 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 40 percent.
FRIDAY NIGHT
Showers likely. Lows around 60. Chance of rain 70 percent.
SATURDAY
Showers likely in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. Chance of rain 70 percent.

  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  4/11/2026
Sunday
12 APR 2026		 DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 60° 58° Partly Cloudy 4%

 0% Thunder
( 3% severe)		 SSE   13 75% 52°
Low 59° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 60° 58° Partly Cloudy S   13 81% 54°
High 80° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 60° 58° Partly Cloudy 7%

 0% Thunder
( 3% severe)		 S   14 81% 54°

Mostly Cloudy

Chance of Rain


Breezy		 DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 71° 71° Partly Cloudy SSW   18 59% 56°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 79° 80° Mostly Cloudy 38%
RAIN
<.01 in		 0% Thunder
( 11% severe)		 SSW   23 45% 56°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 78° 79° Mostly Cloudy SSW   23 47% 56°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 73° 73° Mostly Cloudy 66%
RAIN
.25–.5 in		 0% Thunder
( 15% severe)		 S   20 51% 54°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 69° 69° Mostly Cloudy SSW   20 57% 53°
Monday
13 APR 2026		 DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 67° 67° Mostly Cloudy 70%
RAIN
1–2 in		 0% Thunder
( 28% severe)		 SSW   18 63% 54°
Low 63° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 65° 65° Mostly Cloudy SW   17 75% 57°
High 82° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 64° 63° Mostly Cloudy 23%
RAIN
.01–.1 in		 0% Thunder
( 15% severe)		 SSW   15 84% 59°

Mostly Cloudy

Chance of Rain


Breezy		 DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 70° 70° Mostly Cloudy SSW   17 76% 62°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 77° 79° Mostly Cloudy 16%
RAIN
<.01 in		 0% Thunder
( 21% severe)		 SSW   18 62% 63°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 81° 82° Partly Cloudy SSW   20 53% 62°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 77° 79° Mostly Cloudy 15%
RAIN
<.01 in		 0% Thunder
( 14% severe)		 S   17 58% 61°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 73° 73° Mostly Cloudy SSW   18 66% 61°

DECATUR, IL extended weather forecast
Tuesday
14 APR 2026		 Wednesday
15 APR 2026		 Thursday
16 APR 2026		 Friday
17 APR 2026		 Saturday
18 APR 2026
Low 64° Low 64° Low 57° Low 55° Low 59°
High 83° High 76° High 78° High 79° High 71°
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
23% Rain		 Overcast
78% Rain		 Mostly Cloudy
67% Rain		 Partly Cloudy
18% Rain		 Overcast
57% Rain
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