DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

7:54 AM CDT MAY 1, 2026
Clear
46°F
Feels Like: 40°F
Dewpoint: 39°F
Rel. Hum.: 76%
Visibility: 10 miles
Wind: NNW at 14 mph
Pressure: 30.02 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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REST OF TODAY
Sunny. Highs in the upper 50s. Northwest winds 10 to 15 mph.
TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A 20 percent chance of showers. Lows in the upper 30s. North winds 5 to 10 mph, becoming east after midnight.
SATURDAY
Mostly sunny. Highs in the upper 50s. Northeast winds around 5 mph, becoming northwest in the afternoon.
SATURDAY NIGHT
Mostly clear. Lows in the upper 30s. Northwest winds 5 to 10 mph, becoming southwest after midnight.
SUNDAY
Mostly sunny. Not as cool with highs in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph.
SUNDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Not as cool with lows in the lower 50s. Chance of rain 50 percent.
MONDAY AND MONDAY NIGHT
Partly cloudy. A chance of showers and thunderstorms. Highs in the mid 70s. Lows in the lower 50s. Chance of rain 50 percent.
TUESDAY
Partly sunny with a chance of showers in the morning, then mostly cloudy with showers likely in the afternoon. Cooler with highs in the mid 60s. Chance of rain 70 percent.
TUESDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the mid 40s. Chance of rain 50 percent.
WEDNESDAY
Partly sunny. Highs around 60.
WEDNESDAY NIGHT AND THURSDAY
Partly cloudy. Lows in the lower 40s. Highs in the lower 60s.

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  4/30/2026
Friday
1 MAY 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 1 AM 50° 46° Mostly Cloudy 7%

0% Thunder
( 4% severe)
WNW   10 80% 44°
Low 41° DECATUR, IL 62521 weather forecast Day 1, 3 hours 4 AM 45° 40° Partly Cloudy NW   10 79% 39°
High 58° DECATUR, IL 62521 weather forecast Day 1, 6 hours 7 AM 42° 36° Clear 0%

0% Thunder
( 0% severe)
NW   10 79% 36°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 10 AM 50° 46° Clear NNW   12 54% 34°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 55° 52° Partly Cloudy 4%

0% Thunder
( 5% severe)
NNW   13 41% 32°
DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 57° 54° Partly Cloudy NW   12 39% 32°
DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 55° 52° Partly Cloudy 9%

0% Thunder
( 4% severe)
NNW   9 43% 33°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 48° 46° Partly Cloudy NE   5 63% 36°
Saturday
2 MAY 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 45° 42° Mostly Cloudy 15%
RAIN
.1–.25 in
0% Thunder
( 4% severe)
E   6 71% 36°
Low 40° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 42° 39° Mostly Cloudy ESE   5 76% 35°
High 57° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 41° 39° Partly Cloudy 5%

0% Thunder
( 5% severe)
E   3 79% 35°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 49° 47° Partly Cloudy NNE   6 61% 36°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 53° 50° Mostly Cloudy 3%

0% Thunder
( 7% severe)
NNW   9 48% 34°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 55° 52° Partly Cloudy NW   10 41% 32°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 54° 51° Partly Cloudy 0%

0% Thunder
( 1% severe)
NW   9 43% 32°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 46° 45° Clear NW   3 60% 33°

DECATUR, IL extended weather forecast

Sunday
3 MAY 2026
Monday
4 MAY 2026
Tuesday
5 MAY 2026
Wednesday
6 MAY 2026
Thursday
7 MAY 2026
Low 39° Low 56° Low 49° Low 43° Low 43°
High 71° High 74° High 61° High 60° High 61°
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
12% Rain
Overcast
67% Rain
Overcast
71% Rain
Overcast
70% Rain
Mostly Cloudy
47% Rain
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