DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

3:54 PM CDT OCT 23, 2026
Clear
73°F
Feels Like: 73°F
Dewpoint: 45°F
Rel. Hum.: 37%
Visibility: 10 miles
Wind: Variable at 3 mph
Pressure: 30.26 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. Lows in the mid 40s. Southeast winds 5 to 10 mph.
SATURDAY
Mostly sunny. Highs in the mid 70s. Southeast winds 5 to 10 mph.
SATURDAY NIGHT
Mostly clear. Lows in the upper 40s. Southeast winds around 5 mph.
SUNDAY
Mostly sunny. Highs in the upper 70s. South winds around 5 mph.
SUNDAY NIGHT
Mostly cloudy. Lows in the upper 40s. South winds around 5 mph.
MONDAY THROUGH TUESDAY NIGHT
Mostly cloudy. Highs in the mid 70s. Lows in the upper 40s.
WEDNESDAY
Mostly sunny. Highs in the mid 70s.
WEDNESDAY NIGHT
Mostly clear. Lows in the lower 50s.
THURSDAY AND THURSDAY NIGHT
Partly cloudy. Highs in the mid 70s. Lows in the mid 40s.
FRIDAY
Mostly sunny. 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  8:00 AM EDT 10/23/2026
Friday
23 OCT 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 1 PM 72° 72° Clear 0%

0% Thunder
( 0% severe)
SSE   6 41% 47°
High 75° DECATUR, IL 62521 weather forecast Day 1, 15 hours 4 PM 74° 74° Clear SE   6 35% 45°
Clear



DECATUR, IL 62521 weather forecast Day 1, 18 hours 7 PM 62° 62° Clear 0%

0% Thunder
( 0% severe)
ESE   7 56% 46°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 10 PM 55° 53° Clear SE   7 72% 46°
Saturday
24 OCT 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 1 AM 52° 50° Clear 2%

0% Thunder
( 0% severe)
SE   6 80% 46°
Low 46° DECATUR, IL 62521 weather forecast Day 2, 3 hours 4 AM 49° 47° Partly Cloudy SE   6 89% 46°
High 74° DECATUR, IL 62521 weather forecast Day 2, 6 hours 7 AM 47° 44° Partly Cloudy 2%

0% Thunder
( 0% severe)
SE   6 93% 45°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 10 AM 61° 60° Partly Cloudy SSE   7 65% 49°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 1 PM 71° 71° Partly Cloudy 2%

0% Thunder
( 0% severe)
SSE   7 42% 47°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 4 PM 73° 73° Partly Cloudy SSE   7 35% 44°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 7 PM 63° 63° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   6 54% 46°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 10 PM 55° 54° Partly Cloudy SE   6 72% 46°
Sunday
25 OCT 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 1 AM 52° 51° Partly Cloudy 0%

0% Thunder
( 0% severe)
SE   5 80% 46°
Low 46° DECATUR, IL 62521 weather forecast Day 3, 3 hours 4 AM 49° 47° Partly Cloudy SE   5 86% 45°
High 76° DECATUR, IL 62521 weather forecast Day 3, 6 hours 7 AM 48° 47° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSE   3 86% 44°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 10 AM 63° 64° Partly Cloudy SSE   5 60% 49°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 1 PM 73° 73° Partly Cloudy 0%

0% Thunder
( 0% severe)
S   5 40% 47°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 4 PM 76° 77° Partly Cloudy S   5 33% 45°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 7 PM 64° 65° Mostly Cloudy     SSE   3 54% 47°

DECATUR, IL extended weather forecast

Monday
26 OCT 2026
Tuesday
27 OCT 2026
Wednesday
28 OCT 2026
Thursday
29 OCT 2026
Friday
30 OCT 2026
Low 46° Low 47° Low 51° Low 51° Low 49°
High 74° High 74° High 76° High 73° High 67°
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
Clear
10% Rain
Partly Cloudy
16% Rain
Partly Cloudy
20% Rain
Clear
17% Rain
Mostly Cloudy
43% Rain
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