DECATUR, IL 62521 Weather Forecast & Current Conditions

Enter ZIP code or City, State   
    


DECATUR, IL
Current Weather

6:54 AM CDT MAR 27, 2026
Scattered Clouds
34°F
Feels Like: 24°F
Dewpoint: 28°F
Rel. Hum.: 78%
Visibility: 10 miles
Wind: NNE at 16 mph
Pressure: 30.28 inches
Last 72 hours

Local Area Snow Depth

Illinois Current Weather

Illinois MOS Forecast Weather


Weather Map


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

DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly cloudy this morning, then becoming mostly sunny. Much cooler with highs in the upper 40s. North winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Mostly clear. Lows in the upper 20s. North winds 10 to 15 mph with gusts up to 25 mph.
SATURDAY
Sunny. Highs in the lower 50s. Northeast winds around 5 mph, becoming south in the afternoon.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Not as cool with lows in the upper 30s. South winds 10 to 15 mph.
SUNDAY
Mostly cloudy. Not as cool with highs in the lower 60s. South winds 15 to 20 mph.
SUNDAY NIGHT AND MONDAY
Mostly cloudy. Lows in the lower 50s. Highs in the upper 70s.
MONDAY NIGHT
Mostly cloudy with a chance of rain and thunderstorms. Not as cool with lows in the lower 60s. Chance of rain 40 percent.
TUESDAY
Partly sunny. A chance of rain in the afternoon. Breezy with highs in the lower 80s. Chance of rain 40 percent.
TUESDAY NIGHT
Mostly cloudy with a chance of rain. Lows in the upper 50s. Chance of rain 50 percent.
WEDNESDAY
Mostly cloudy with a chance of rain. A chance of thunderstorms in the afternoon. Cooler with highs in the lower 70s. Chance of rain 50 percent.
WEDNESDAY NIGHT AND THURSDAY
Rain likely with a chance of thunderstorms. Lows in the upper 40s. Highs in the lower 60s. Chance of rain 70 percent.

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  3/26/2026
Friday
27 MAR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM 45° 37° Mostly Cloudy 88%
RAIN
***
0% Thunder
( 13% severe)
NNE   21 82% 40°
Low 34° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM 39° 29° Mostly Cloudy NNE   20 76% 32°
High 49° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM 35° 25° Mostly Cloudy 7%

0% Thunder
( 0% severe)
N   17 78% 29°

Mostly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 38° 29° Mostly Cloudy N   17 70% 29°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 43° 35° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   17 60% 30°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 46° 39° Partly Cloudy NNW   17 47% 27°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 43° 36° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   13 50% 26°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 38° 31° Clear NNW   10 61% 26°
Saturday
28 MAR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 35° 27° Clear 0%

0% Thunder
( 0% severe)
NNW   10 60% 23°
Low 27° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 31° 24° Clear N   8 64% 21°
High 51° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 28° 24° Clear 0%

0% Thunder
( 0% severe)
N   3 70% 20°

Clear



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 37° 32° Clear E   6 48% 20°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 45° 41° Clear 0%

0% Thunder
( 0% severe)
S   8 41% 23°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 50° 46° Clear S   10 35% 24°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 47° 42° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   10 45% 27°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 43° 37° Mostly Cloudy S   12 55% 28°

DECATUR, IL extended weather forecast

Sunday
29 MAR 2026
Monday
30 MAR 2026
Tuesday
31 MAR 2026
Wednesday
1 APR 2026
Thursday
2 APR 2026
Low 34° Low 52° Low 61° Low 46° Low 33°
High 65° High 76° High 76° High 56° 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
Overcast
9% Rain
Mostly Cloudy
33% Rain
Partly Cloudy
74% Rain
Mostly Cloudy
42% Rain
SELECT BOX EXAMPLES:
for LOCAL WEATHER:
SNOW DEPTH:
LOCAL WEATHER RADAR:
STATE WEATHER MAP:
Decatur, IL
Decatur, IL snow
Decatur, IL radar
IL map
-or-
-or-
-or-
 
62521
62521 snow
62521 radar
 
-or-
-or-
 
 
IL
IL snow
 
 
Copyright © 2024 WeatherStreet.com
Put our free WeatherStreet weather lookup on your web page.
Terms & Conditions