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

7°F

-14°C

Humidity 70%
Wind Speed SW 6 mph
Barometer 30.41 in (1031.1 mb)
Dewpoint -1°F (-18°C)
Visibility 10.00 mi
Wind Chill-4°F (-20°C)
Last update 20 Jan 3:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

  • Today

    Today: Mostly sunny, with a high near 30. Wind chill values between -4 and 6. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 30 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. South wind 11 to 18 mph, with gusts as high as 29 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 37. West wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 37 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19. West southwest wind 13 to 18 mph, with gusts as high as 31 mph.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. West wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 2. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    Low: 2 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near 8. North wind 13 to 15 mph, with gusts as high as 20 mph.

    High: 8 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 12.

    High: 12 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Today
Mostly sunny, with a high near 30. Wind chill values between -4 and 6. South southwest wind 6 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, with a low around 24. South wind 11 to 18 mph, with gusts as high as 29 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 37. West wind 14 to 18 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 19. West southwest wind 13 to 18 mph, with gusts as high as 31 mph.
Thursday
Mostly sunny, with a high near 29. West wind 8 to 13 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 2. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Friday
Partly sunny and cold, with a high near 8. North wind 13 to 15 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around -2.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 12.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 3.
Sunday
Mostly sunny, with a high near 20.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Sunny, with a high near 22.
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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:
3:36 am CST Jan 20, 2026
Forecast Valid:
4am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation