DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

9:54 PM CST JAN 19, 2026
Clear
9°F
Feels Like: 0°F
Dewpoint: -6°F
Rel. Hum.: 45%
Visibility: 10 miles
Wind: WNW at 5 mph
Pressure: 30.39 inches
Last 72 hours

Local Area Snow Depth

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DECATUR, IL 62521
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
REST OF TONIGHT
Partly cloudy. Near steady temperature around 7 above. Southwest winds around 5 mph.
TUESDAY
Mostly sunny. Not as cool with highs around 30. South winds 10 to 15 mph. Wind chill values as low as 3 below in the morning.
TUESDAY NIGHT
Mostly cloudy. Not as cool with lows in the mid 20s. Temperature rising into the lower 30s after midnight. South winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY
Partly sunny in the morning, then clearing. Highs in the upper 30s. West winds 15 to 20 mph with gusts up to 30 mph.
WEDNESDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows around 19. Southwest winds 10 to 15 mph, becoming northwest after midnight.
THURSDAY
Mostly sunny. Highs around 30.
THURSDAY NIGHT AND FRIDAY
Mostly cloudy. Lows zero to 5 above zero. Highs around 10 above. Wind chill values as low as 15 below.
FRIDAY NIGHT AND SATURDAY
Mostly cloudy. Lows 5 below to zero. Highs around 10 above. Wind chill values as low as 20 below.
SATURDAY NIGHT AND SUNDAY
Partly cloudy. Lows around zero. Highs around 20. Wind chill values as low as 15 below.
SUNDAY NIGHT
Partly cloudy. Lows 5 to 10 above. Wind chill values as low as 5 below.
MONDAY
Sunny. Highs in the upper 20s. Wind chill values as low as 5 below in the morning.

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 PM EST  1/19/2026
Tuesday
20 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 0 hours 12 AM Mostly Cloudy 0%

0% Thunder
( 0% severe)
WSW   5 47% -5°
Low 7° DECATUR, IL 62521 weather forecast Day 1, 3 hours 3 AM -2° Clear SW   6 50% -5°
High 30° DECATUR, IL 62521 weather forecast Day 1, 6 hours 6 AM -2° Partly Cloudy 0%

0% Thunder
( 0% severe)
SSW   6 53% -4°

Partly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 9 hours 9 AM 15° Mostly Cloudy SSW   8 41% -2°
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 25° 14° Partly Cloudy 1%

0% Thunder
( 0% severe)
SSW   12 32%
DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 29° 19° Partly Cloudy S   13 30%
DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 26° 16° Partly Cloudy 1%

0% Thunder
( 0% severe)
S   10 40%
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 27° 16° Mostly Cloudy S   14 40%
Wednesday
21 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 28° 16° Mostly Cloudy 5%

0% Thunder
( 1% severe)
S   17 42% 10°
Low 23° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 30° 18° Mostly Cloudy SSW   17 48% 14°
High 39° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 31° 20° Mostly Cloudy 5%

0% Thunder
( 0% severe)
SW   16 58% 19°

Decreasing Clouds




Breezy
DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 33° 22° Partly Cloudy WSW   16 62% 22°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 36° 26° Partly Cloudy 1%

0% Thunder
( 0% severe)
W   17 55% 22°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 37° 28° Clear W   15 48% 20°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 31° 22° Clear 1%

0% Thunder
( 0% severe)
WSW   10 58% 19°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 30° 20° Partly Cloudy SW   13 61% 19°

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 22° Low 20° Low 3° Low -3° Low 7°
High 41° High 29° High 7° High 15° High 20°
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
Mostly Cloudy
8% Snow
Partly Cloudy
10% Snow
Mostly Cloudy
12% Snow
Overcast
14% Snow
Overcast
16% Snow
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