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.

Partly Cloudy

14°F

-10°C

Humidity 64%
Wind Speed W 14 G 25 mph
Barometer 30.11 in (1020.6 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill-1°F (-18°C)
Last update 17 Mar 2:54 am CDT
Extended Forecast for

Forsyth IL

  • Overnight

    Overnight: A chance of flurries. Mostly cloudy, with a low around 12. Wind chill values between -2 and 3. West northwest wind around 18 mph, with gusts as high as 25 mph.

    Low: 12 °F

    Chance
    Flurries

  • Tuesday

    Tuesday: Partly sunny, with a high near 28. Wind chill values between -5 and 5. West northwest wind 9 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 22 mph.

    High: 28 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Snow, mainly after 11pm. Low around 24. South wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 54. South wind 11 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 54 °F

    Chance Snow
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. West wind around 6 mph becoming south after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 63. South wind 7 to 9 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. North wind around 6 mph becoming south southeast after midnight.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of flurries. Mostly cloudy, with a low around 12. Wind chill values between -2 and 3. West northwest wind around 18 mph, with gusts as high as 25 mph.
Tuesday
Partly sunny, with a high near 28. Wind chill values between -5 and 5. West northwest wind 9 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Snow, mainly after 11pm. Low around 24. South wind 7 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday
A 30 percent chance of snow before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 54. South wind 11 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Mostly cloudy, with a low around 36. West wind around 6 mph becoming south after midnight.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 63. South wind 7 to 9 mph.
Thursday Night
Partly cloudy, with a low around 41. North wind around 6 mph becoming south southeast after midnight.
Friday
Mostly sunny, with a high near 70.
Friday Night
Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Mostly sunny, with a high near 68. Breezy.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
1:56 am CDT Mar 17, 2026
Forecast Valid:
3am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation