DECATUR, IL 62521 Weather Forecast & Current Conditions

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DECATUR, IL
Current Weather

9:54 PM CST JAN 2, 2026
Clear
27°F
Feels Like: 18°F
Dewpoint: 19°F
Rel. Hum.: 69%
Visibility: 10 miles
Wind: NNE at 9 mph
Pressure: 30.01 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
Cloudy. Lows in the lower 20s. Northeast winds around 5 mph.
SATURDAY
Partly sunny in the morning, then clearing. Highs in the mid 30s. Northeast winds around 5 mph, becoming northwest in the afternoon.
SATURDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows around 19. Northwest winds around 5 mph.
SUNDAY
Partly sunny. Highs in the mid 30s. Northeast winds around 5 mph, becoming southeast around 5 mph in the afternoon.
SUNDAY NIGHT
Mostly cloudy in the evening, then clearing. Lows in the upper 20s. South winds 5 to 10 mph with gusts up to 20 mph.
MONDAY
Mostly sunny. Not as cool with highs around 50.
MONDAY NIGHT
Mostly cloudy. Not as cool with lows in the upper 30s.
TUESDAY
Mostly sunny. Highs in the mid 50s.
TUESDAY NIGHT
Mostly cloudy. Lows in the mid 30s.
WEDNESDAY
Mostly sunny. Highs in the mid 50s.
WEDNESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 40s.
THURSDAY AND THURSDAY NIGHT
Mostly cloudy with a 50 percent chance of rain. Highs in the upper 50s. Lows in the mid 40s.
FRIDAY
Mostly cloudy with a 30 percent chance of rain. Highs in the mid 50s.

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  1/ 2/2026
Friday
2 JAN 2026
DECATUR, IL 62521 weather forecast Day 1, 12 hours 12 PM 30° 24° Mostly Cloudy 1%

0% Thunder
( 0% severe)
NNE   6 55% 17°
High 33° DECATUR, IL 62521 weather forecast Day 1, 15 hours 3 PM 32° 26° Mostly Cloudy NNE   7 51% 17°
Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 1, 18 hours 6 PM 28° 22° Mostly Cloudy 1%

0% Thunder
( 0% severe)
NE   6 66% 19°
DECATUR, IL 62521 weather forecast Day 1, 21 hours 9 PM 26° 19° Mostly Cloudy NE   6 69% 18°
Saturday
3 JAN 2026
DECATUR, IL 62521 weather forecast Day 2, 0 hours 12 AM 26° 19° Mostly Cloudy 7%

0% Thunder
( 0% severe)
NE   6 69% 18°
Low 23° DECATUR, IL 62521 weather forecast Day 2, 3 hours 3 AM 26° 19° Mostly Cloudy NE   6 66% 17°
High 35° DECATUR, IL 62521 weather forecast Day 2, 6 hours 6 AM 25° 18° Mostly Cloudy 8%

0% Thunder
( 0% severe)
NE   6 69% 17°

Decreasing Clouds



DECATUR, IL 62521 weather forecast Day 2, 9 hours 9 AM 28° 22° Mostly Cloudy NE   6 57% 16°
DECATUR, IL 62521 weather forecast Day 2, 12 hours 12 PM 33° 29° Partly Cloudy 1%

0% Thunder
( 0% severe)
N   5 47% 16°
DECATUR, IL 62521 weather forecast Day 2, 15 hours 3 PM 35° 30° Clear NNW   6 41% 15°
DECATUR, IL 62521 weather forecast Day 2, 18 hours 6 PM 29° 23° Partly Cloudy 0%

0% Thunder
( 0% severe)
NW   6 58% 17°
DECATUR, IL 62521 weather forecast Day 2, 21 hours 9 PM 26° 20° Partly Cloudy NW   5 63% 16°
Sunday
4 JAN 2026
DECATUR, IL 62521 weather forecast Day 3, 0 hours 12 AM 24° 20° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   3 68% 16°
Low 19° DECATUR, IL 62521 weather forecast Day 3, 3 hours 3 AM 23° 18° Clear NNW   3 68% 15°
High 36° DECATUR, IL 62521 weather forecast Day 3, 6 hours 6 AM 21° 17° Partly Cloudy 0%

0% Thunder
( 0% severe)
N   2 75% 15°

Mostly Cloudy



DECATUR, IL 62521 weather forecast Day 3, 9 hours 9 AM 25° 21° Partly Cloudy ENE   2 65% 16°
DECATUR, IL 62521 weather forecast Day 3, 15 hours 12 PM 32° 29° Mostly Cloudy 0%

0% Thunder
( 0% severe)
SSE   3 51% 17°
DECATUR, IL 62521 weather forecast Day 3, 18 hours 3 PM 35° 29° Mostly Cloudy SSE   7 50% 19°
DECATUR, IL 62521 weather forecast Day 3, 21 hours 6 PM 31° 24° Mostly Cloudy     SE   8 64% 21°

DECATUR, IL extended weather forecast

Monday
5 JAN 2026
Tuesday
6 JAN 2026
Wednesday
7 JAN 2026
Thursday
8 JAN 2026
Friday
9 JAN 2026
Low 24° Low 36° Low 40° Low 41° Low 40°
High 48° High 54° High 55° High 58° High 61°
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
8% Rain/Snow
Mostly Cloudy
15% Rain
Partly Cloudy
16% Rain
Overcast
50% Rain
Overcast
33% Rain
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