DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

3:54 AM CDT APR 10, 2026
Overcast
64°F
Feels Like: 62°F
Dewpoint: 46°F
Rel. Hum.: 52%
Visibility: 10 miles
Wind: SSW at 17 mph, gusts to 26
Pressure: 30.10 inches
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DECATUR, IL 62521
Weather Forecast

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Snow Depth pages
TODAY
Cloudy with a slight chance of thunderstorms. Showers likely, mainly this morning. Much cooler with highs in the mid 60s. West winds 10 to 15 mph, becoming north this afternoon. Chance of rain 60 percent.
TONIGHT
Partly cloudy in the evening, then clearing. Cooler with lows in the mid 40s. Northeast winds 5 to 10 mph.
SATURDAY
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the mid 60s. East winds around 10 mph.
SATURDAY NIGHT
Mostly cloudy. Not as cool with lows in the upper 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph.
SUNDAY
Partly sunny in the morning, then mostly cloudy with a chance of showers in the afternoon. Windy and not as cool with highs in the upper 70s. South winds 20 to 30 mph. Chance of rain 40 percent.
SUNDAY NIGHT
Showers likely, mainly in the evening. Breezy with lows in the lower 60s. Chance of rain 60 percent.
MONDAY
Mostly cloudy in the morning, then partly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent.
MONDAY NIGHT
A chance of showers in the evening. Mostly cloudy. Lows in the mid 60s. Chance of rain 30 percent.
TUESDAY
Partly sunny in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Breezy with highs in the lower 80s. Chance of rain 50 percent.
TUESDAY NIGHT
Showers likely with a chance of thunderstorms in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 70 percent.
WEDNESDAY AND WEDNESDAY NIGHT
Mostly cloudy. A chance of showers. Highs in the upper 70s. Lows in the upper 50s. Chance of rain 50 percent.
THURSDAY
Partly sunny with a 40 percent chance of showers. Highs in the upper 70s.

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 PM EDT  4/ 9/2026
Friday
10 APR 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 63° 61° Partly Cloudy 54%
RAIN
>2 in
0% Thunder
( 16% severe)
SSW   16 56% 47°
Low 58° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 62° 60° Mostly Cloudy SSW   16 60% 48°
High 65° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 59° 57° Mostly Cloudy 68%
RAIN
***
0% Thunder
( 13% severe)
SW   13 78% 52°

Mostly Cloudy

Rain Likely

DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 61° 59° Mostly Cloudy W   14 78% 54°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 62° 60° Mostly Cloudy 34%
RAIN
.01–.1 in
0% Thunder
( 7% severe)
NNW   14 72% 53°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 61° 59° Mostly Cloudy N   12 65% 49°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 58° 56° Mostly Cloudy 4%

0% Thunder
( 1% severe)
NNE   9 64% 46°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 52° 49° Partly Cloudy NE   8 77% 45°
Saturday
11 APR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 48° 44° Partly Cloudy 5%

0% Thunder
( 1% severe)
ENE   9 80% 42°
Low 42° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 45° 40° Partly Cloudy ENE   9 79% 39°
High 66° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 43° 37° Partly Cloudy 9%

0% Thunder
( 3% severe)
E   10 82% 38°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 52° 48° Mostly Cloudy E   12 66% 41°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 59° 57° Mostly Cloudy 16%
RAIN
<.01 in
0% Thunder
( 9% severe)
ESE   12 60% 45°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 63° 62° Mostly Cloudy SE   10 60% 49°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 63° 62° Mostly Cloudy 5%

0% Thunder
( 4% severe)
SE   9 65% 51°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 60° 58° Mostly Cloudy SE   12 75% 52°

DECATUR, IL extended weather forecast

BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
BAD DAY
BAD DATE
Low 44° Low 55° Low 57° Low 60° Low 61°
High 65° High 76° High 78° High 77° 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
24% Rain
Overcast
43% Rain
Overcast
47% Rain
Overcast
42% Rain
Overcast
53% Rain
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