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.

Fog/Mist

37°F

3°C

Humidity 96%
Wind Speed SE 8 mph
Barometer 30.17 in (1022.2 mb)
Dewpoint 36°F (2°C)
Visibility 3.00 mi
Wind Chill31°F (-1°C)
Last update 2 Mar 11:54 pm CST
Extended Forecast for

4 Miles N Forsyth IL

  • Overnight

    Overnight: Rain likely, mainly after 5am. Patchy fog after 4am. Otherwise, cloudy, with a low around 35. East wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain, with thunderstorms also possible after 3pm. High near 49. East wind around 6 mph becoming north northeast in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 49 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Low around 42. East northeast wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 42 °F

    Rain

  • Wednesday

    Wednesday: Rain before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. High near 58. East northeast wind 7 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 51. South wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Showers

  • Thursday

    Thursday: Showers, mainly before noon. High near 64. West southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 49. West southwest wind 7 to 10 mph becoming south southeast after midnight. Winds could gust as high as 16 mph.

    Low: 49 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, mainly before noon. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Chance
    T-storms then
    Showers

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Patchy fog after 4am. Otherwise, cloudy, with a low around 35. East wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain, with thunderstorms also possible after 3pm. High near 49. East wind around 6 mph becoming north northeast in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Low around 42. East northeast wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Wednesday
Rain before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. High near 58. East northeast wind 7 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 51. South wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers, mainly before noon. High near 64. West southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 49. West southwest wind 7 to 10 mph becoming south southeast after midnight. Winds could gust as high as 16 mph.
Friday
Showers likely, mainly before noon. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 57. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before noon. Cloudy, with a high near 67. Chance of precipitation is 70%.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Mostly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
9:46 pm CST Mar 2, 2026
Forecast Valid:
12am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation