DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

9:54 PM CDT MAR 28, 2026
Clear
39°F
Feels Like: 34°F
Dewpoint: 30°F
Rel. Hum.: 70%
Visibility: 10 miles
Wind: SSE at 7 mph
Pressure: 30.37 inches
Last 72 hours

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DECATUR, IL 62521
Weather Forecast

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THIS AFTERNOON
Sunny. Highs in the lower 50s. South winds 5 to 10 mph.
TONIGHT
Mostly clear in the evening, then becoming mostly cloudy. Not as cool with lows in the upper 30s. South winds 5 to 10 mph.
SUNDAY
Mostly sunny. Not as cool with highs in the mid 60s. South winds 15 to 20 mph.
SUNDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Not as cool with lows in the lower 50s. South winds around 15 mph with gusts up to 25 mph.
MONDAY
Mostly sunny. Not as cool with highs in the upper 70s. South winds 15 to 20 mph with gusts up to 30 mph.
MONDAY NIGHT
Partly cloudy. Not as cool with lows in the lower 60s.
TUESDAY
Partly sunny in the morning, then mostly cloudy with showers and thunderstorms likely in the afternoon. Breezy with highs around 80. Chance of rain 70 percent.
TUESDAY NIGHT
Showers with thunderstorms likely in the evening, then showers likely after midnight. Much cooler with lows in the lower 40s. Chance of rain 80 percent.
WEDNESDAY
Mostly cloudy with a 40 percent chance of showers. Much cooler with highs in the lower 50s.
WEDNESDAY NIGHT THROUGH THURSDAY NIGHT
Mostly cloudy with a 50 percent chance of showers. Lows in the upper 30s. Highs in the lower 50s.
FRIDAY
Mostly cloudy with a 40 percent chance of showers. Not as cool with highs in the upper 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  7:00 AM EST  3/28/2026
Saturday
28 MAR 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 45° 41° Clear 0%

0% Thunder
( 0% severe)
S   7 47% 26°
High 51° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 50° 46° Clear S   9 40% 27°
Clear



DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 47° 43° Clear 1%

0% Thunder
( 0% severe)
S   9 49% 29°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 42° 36° Partly Cloudy S   10 62% 30°
Sunday
29 MAR 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 41° 34° Mostly Cloudy 1%

0% Thunder
( 0% severe)
S   12 65% 30°
Low 38° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 40° 33° Mostly Cloudy S   12 64% 29°
High 65° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 40° 33° Partly Cloudy 2%

0% Thunder
( 1% severe)
S   12 67% 30°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 50° 45° Partly Cloudy SSW   15 52% 33°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 60° 57° Partly Cloudy 3%

0% Thunder
( 2% severe)
SSW   16 39% 35°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 63° 61° Mostly Cloudy SSW   16 36% 36°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 59° 56° Mostly Cloudy 0%

0% Thunder
( 2% severe)
S   14 47% 39°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 56° 53° Mostly Cloudy S   14 57% 41°
Monday
30 MAR 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM 55° 51° Partly Cloudy 1%

0% Thunder
( 4% severe)
SSW   14 61% 42°
Low 53° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM 54° 50° Partly Cloudy SSW   14 69% 44°
High 78° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM 55° 51° Mostly Cloudy 2%

0% Thunder
( 6% severe)
S   14 72% 46°

Partly Cloudy




Breezy
DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 63° 61° Partly Cloudy SSW   17 62% 50°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 73° 73° Partly Cloudy 3%

0% Thunder
( 10% severe)
SSW   20 49% 53°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 77° 78° Partly Cloudy SSW   21 45% 54°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 72° 72° Partly Cloudy     S   18 57% 56°

DECATUR, IL extended weather forecast

Tuesday
31 MAR 2026
Wednesday
1 APR 2026
Thursday
2 APR 2026
Friday
3 APR 2026
Saturday
4 APR 2026
Low 61° Low 42° Low 38° Low 34° Low 45°
High 70° High 58° High 48° High 60° High 60°
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
Mostly Cloudy
64% Rain
Mostly Cloudy
80% Rain
Overcast
68% Rain
Overcast
35% Rain
Overcast
65% Rain
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