DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

6:54 PM CDT APR 19, 2026
Few Clouds
55°F
Feels Like: 51°F
Dewpoint: 30°F
Rel. Hum.: 38%
Visibility: 10 miles
Wind: NW at 16 mph, gusts to 22
Pressure: 30.16 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TONIGHT
Mostly clear. Areas of frost after midnight. Lows in the mid 30s. North winds 15 to 20 mph with gusts up to 30 mph, diminishing to around 5 mph after midnight.
MONDAY
Widespread frost in the morning. Sunny. Highs around 60. East winds around 5 mph, becoming south in the afternoon.
MONDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Not as cool with lows in the mid 40s. South winds 10 to 15 mph.
TUESDAY
Mostly sunny and breezy. Not as cool with highs in the upper 70s. Southwest winds 15 to 25 mph.
TUESDAY NIGHT
Partly cloudy. Not as cool with lows in the upper 50s. Southwest winds 15 to 20 mph, diminishing to around 10 mph after midnight.
WEDNESDAY
Mostly sunny. Highs in the upper 70s.
WEDNESDAY NIGHT AND THURSDAY
Mostly clear and breezy. Lows in the upper 50s. Highs around 80.
THURSDAY NIGHT AND FRIDAY
Showers likely. Breezy. Lows in the lower 60s. Highs in the mid 70s. Chance of rain 70 percent.
FRIDAY NIGHT
Partly cloudy with a 50 percent chance of showers. Cooler with lows in the upper 40s.
SATURDAY THROUGH SUNDAY
Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.

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 AM EDT  4/19/2026
Sunday
19 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 58° 54° Mostly Cloudy 3%

0% Thunder
( 3% severe)
W   21 29% 26°
High 59° DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 58° 54° Mostly Cloudy WNW   21 33% 29°
Mostly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 53° 48° Partly Cloudy 1%

0% Thunder
( 1% severe)
NNW   15 38% 28°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 45° 40° Partly Cloudy N   9 51% 28°
Monday
20 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 39° 35° Clear 0%

0% Thunder
( 0% severe)
N   6 64% 28°
Low 34° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 36° 32° Clear N   5 72% 28°
High 61° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 35° 31° Clear 0%

0% Thunder
( 1% severe)
NNE   5 75% 28°

Clear



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 47° 45° Clear E   5 43% 26°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 55° 54° Clear 1%

0% Thunder
( 1% severe)
SSE   5 31% 25°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 59° 58° Clear S   6 30% 28°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 57° 55° Clear 0%

0% Thunder
( 1% severe)
S   8 37% 31°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 51° 47° Clear SSE   10 54% 35°
Tuesday
21 APR 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 1 AM 49° 44° Partly Cloudy 0%

0% Thunder
( 1% severe)
S   13 61% 36°
Low 47° DECATUR, IL 62521 weather forecast Day 3, 3 hours 4 AM 49° 44° Partly Cloudy S   13 68% 39°
High 77° DECATUR, IL 62521 weather forecast Day 3, 6 hours 7 AM 50° 45° Partly Cloudy 2%

0% Thunder
( 2% severe)
SSW   14 71% 41°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 3, 9 hours 10 AM 63° 61° Partly Cloudy SW   17 50% 44°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 1 PM 72° 72° Partly Cloudy 5%

0% Thunder
( 15% severe)
SW   20 39% 46°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 4 PM 75° 75° Clear SW   20 37% 47°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 7 PM 71° 71° Partly Cloudy     SW   15 46% 49°

DECATUR, IL extended weather forecast

Wednesday
22 APR 2026
Thursday
23 APR 2026
Friday
24 APR 2026
Saturday
25 APR 2026
Sunday
26 APR 2026
Low 56° Low 55° Low 56° Low 49° Low 47°
High 74° High 76° High 71° High 70° High 69°
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 <!--SEARCHED_TOWN_NAME--> weather forecast Day 8
Overcast
38% Rain
Partly Cloudy
18% Rain
Overcast
60% Rain
Mostly Cloudy
33% Rain
Mostly Cloudy
31% Rain
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