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

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

32°F

0°C

Humidity 54%
Wind Speed SE 17 mph
Barometer 30.24 in (1024.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 8 Feb 11:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 34. East southeast wind 11 to 17 mph, with gusts as high as 24 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 22. East southeast wind 7 to 10 mph, with gusts as high as 17 mph.

    Low: 22 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 44. East southeast wind 6 to 8 mph becoming south in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. South southeast wind 9 to 13 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 51. Northwest wind 9 to 11 mph, with gusts as high as 16 mph.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 26. Northwest wind around 9 mph.

    Low: 26 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44. North northwest wind 7 to 9 mph.

    High: 44 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 34. East southeast wind 11 to 17 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 22. East southeast wind 7 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 44. East southeast wind 6 to 8 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 33. South southeast wind 9 to 13 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 51. Northwest wind 9 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Partly cloudy, with a low around 26. Northwest wind around 9 mph.
Wednesday
Mostly sunny, with a high near 44. North northwest wind 7 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 40.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 26.
Friday
Mostly sunny, with a high near 41.
Friday Night
A chance of rain and snow. Partly cloudy, with a low around 26.
Saturday
A chance of rain. Partly sunny, with a high near 41.
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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:
12:26 pm CST Feb 8, 2026
Forecast Valid:
12pm CST Feb 8, 2026-6pm CST Feb 14, 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