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

35°F

2°C

Humidity 76%
Wind Speed E 7 mph
Barometer 30.18 in (1022.3 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 14 Mar 7:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Today

    Today: Partly sunny, with a high near 53. East southeast wind 10 to 16 mph, with gusts as high as 23 mph.

    High: 53 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. Breezy, with an east southeast wind 14 to 20 mph, with gusts as high as 29 mph.

    Low: 45 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1pm. High near 67. Windy, with a south wind 23 to 31 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Windy. Chance
    Rain then
    Rain

  • Sunday Night

    Sunday Night: Rain before 11pm, then rain and snow between 11pm and 1am, then snow likely after 1am. Patchy blowing snow after 1am. Low around 19. Wind chill values between 5 and 15. Windy, with a south southwest wind 26 to 30 mph becoming west northwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: A 50 percent chance of snow before 1pm. Areas of blowing snow. Cloudy, with a high near 24. Windy, with a west northwest wind around 30 mph, with gusts as high as 41 mph.

    High: 24 °F

    Chance Snow
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 9. Blustery, with a west northwest wind 16 to 23 mph, with gusts as high as 32 mph.

    Low: 9 °F

    Mostly Cloudy
    and Blustery

  • Tuesday

    Tuesday: Mostly sunny, with a high near 27. West northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 27 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. Breezy.

    High: 54 °F

    Mostly Cloudy
    and Breezy
    then Sunny

Detailed Forecast

Today
Partly sunny, with a high near 53. East southeast wind 10 to 16 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around 45. Breezy, with an east southeast wind 14 to 20 mph, with gusts as high as 29 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1pm. High near 67. Windy, with a south wind 23 to 31 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Rain before 11pm, then rain and snow between 11pm and 1am, then snow likely after 1am. Patchy blowing snow after 1am. Low around 19. Wind chill values between 5 and 15. Windy, with a south southwest wind 26 to 30 mph becoming west northwest after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Monday
A 50 percent chance of snow before 1pm. Areas of blowing snow. Cloudy, with a high near 24. Windy, with a west northwest wind around 30 mph, with gusts as high as 41 mph.
Monday Night
Mostly cloudy, with a low around 9. Blustery, with a west northwest wind 16 to 23 mph, with gusts as high as 32 mph.
Tuesday
Mostly sunny, with a high near 27. West northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 54. Breezy.
Wednesday Night
Mostly clear, with a low around 34.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
7:56 am CDT Mar 14, 2026
Forecast Valid:
8am CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation