DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

11:54 AM CST DEC 13, 2025
Snow
Freezing Fog
12°F
Feels Like: 0°F
Dewpoint: 9°F
Rel. Hum.: 86%
Visibility: 1/4 miles
Wind: NNW at 9 mph
Pressure: 30.26 inches
Last 72 hours

Local Area Snow Depth

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Illinois MOS Forecast Weather


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2025 Hurricanes

DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
THIS AFTERNOON
Snow. Snow accumulation of 2 to 4 inches. Cooler. Near steady temperature around 11. Northwest winds around 10 mph. Chance of snow near 100 percent. Wind chill values as low as 4 below.
TONIGHT
Mostly cloudy in the evening, then clearing. Much colder with lows around 5 below. Northwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 23 below.
SUNDAY
Sunny. Much colder with highs around 4 above. Northwest winds 5 to 10 mph. Gusts up to 25 mph in the morning. Wind chill values as low as 24 below.
SUNDAY NIGHT
Mostly clear. Cold with lows around 7 below. Temperature rising to around zero after midnight. Southwest winds 5 to 10 mph with gusts up to 20 mph. Wind chill values as low as 20 below.
MONDAY
Mostly sunny. Not as cool with highs in the upper 20s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 15 below in the morning.
MONDAY NIGHT AND TUESDAY
Partly cloudy. Lows 15 to 20. Highs in the mid 30s.
TUESDAY NIGHT AND WEDNESDAY
Mostly cloudy. Lows in the upper 20s. Highs in the lower 40s.
WEDNESDAY NIGHT
Mostly cloudy. A chance of rain after midnight. Lows in the upper 30s. Temperature rising into the mid 40s after midnight. Chance of rain 40 percent.
THURSDAY
Partly sunny. A chance of rain in the morning. Highs in the upper 40s. Temperature falling into the upper 30s in the afternoon. Chance of rain 40 percent.
THURSDAY NIGHT
Partly cloudy. Much cooler with lows around 20.
FRIDAY
Partly sunny. Highs in the upper 30s.

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 12/13/2025
Saturday
13 DEC 2025
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 13° Mostly Cloudy 97%
SNOW
***
0% Thunder
( 1% severe)
NNW   10 90% 11°
High 14° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 12° -2° Mostly Cloudy NNW   12 81%
Mostly Cloudy

Snow

DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM -6° Mostly Cloudy 8%

0% Thunder
( 0% severe)
NNW   12 81%
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM -10° Mostly Cloudy NW   12 81%
Sunday
14 DEC 2025
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM -15° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   12 76% -3°
Low -6° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM -1° -18° Partly Cloudy NW   12 76% -6°
High 5° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM -3° -21° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   12 72% -9°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM -3° -21° Partly Cloudy NW   12 76% -8°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM -14° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   9 72% -5°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM -9° Clear WNW   8 65% -4°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM -2° -12° Clear 1%

0% Thunder
( 0% severe)
W   5 76% -7°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM -2° -9° Clear SSW   2 76% -7°
Monday
15 DEC 2025
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM -2° -12° Clear 1%

0% Thunder
( 0% severe)
S   5 80% -6°
Low -3° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM -13° Clear S   8 76% -4°
High 28° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM -10° Partly Cloudy 1%

0% Thunder
( 0% severe)
S   13 69% -1°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 13° -3° Partly Cloudy SSW   15 66%
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 22° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   15 58% 11°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 27° 16° Partly Cloudy SW   13 60% 16°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 25° 15° Partly Cloudy     SW   10 65% 16°

DECATUR, IL extended weather forecast

Tuesday
16 DEC 2025
Wednesday
17 DEC 2025
Thursday
18 DEC 2025
Friday
19 DEC 2025
Saturday
20 DEC 2025
Low 12° Low 28° Low 37° Low 31° Low 40°
High 40° High 46° High 60° High 45° High 53°
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
4% Rain/Snow
Mostly Cloudy
14% Rain
Overcast
58% Rain
Mostly Cloudy
11% Rain/Snow
Overcast
53% Rain
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