National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

10°F

-12°C

Humidity 69%
Wind Speed NE 7 mph
Barometer 30.28 in (1026.4 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill-1°F (-18°C)
Last update 29 Jan 2:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

  • Overnight

    Overnight: Mostly cloudy, with a low around -1. Wind chill values between -3 and -8. North wind 3 to 6 mph.

    Low: -1 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 16. Wind chill values between -9 and 1. North northeast wind around 6 mph.

    High: 16 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -2. Wind chill values between -4 and -14. North wind 3 to 6 mph.

    Low: -2 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 15. Wind chill values between -4 and -14. North wind 6 to 10 mph, with gusts as high as 15 mph.

    High: 15 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 1. North wind 9 to 14 mph, with gusts as high as 20 mph.

    Low: 1 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 19. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 19 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1. Northwest wind 5 to 9 mph.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around -1. Wind chill values between -3 and -8. North wind 3 to 6 mph.
Thursday
Mostly cloudy, with a high near 16. Wind chill values between -9 and 1. North northeast wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around -2. Wind chill values between -4 and -14. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 15. Wind chill values between -4 and -14. North wind 6 to 10 mph, with gusts as high as 15 mph.
Friday Night
Partly cloudy, with a low around 1. North wind 9 to 14 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 19. Northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 1. Northwest wind 5 to 9 mph.
Sunday
Mostly sunny, with a high near 22.
Sunday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 29.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 30.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 18.
Wednesday
A chance of snow. Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
3:11 am CST Jan 29, 2026
Forecast Valid:
3am CST Jan 29, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation