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.

Light Rain Fog/Mist

49°F

9°C

Humidity 100%
Wind Speed E 6 mph
Barometer 30.00 in (1016.3 mb)
Dewpoint 49°F (9°C)
Visibility 1.50 mi
Wind Chill46°F (8°C)
Last update 4 Mar 3:54 pm CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a high near 53. East wind around 6 mph.

    High: 53 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Patchy fog. Low around 49. East wind around 6 mph becoming south after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Chance
    Showers and
    Patchy Fog
    then Showers
    and Areas Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. High near 62. South wind 6 to 11 mph becoming west in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A chance of showers between midnight and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 50. Calm wind becoming south southeast 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 50%.

    Low: 50 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

    High: 76 °F

    Breezy.
    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 54. Breezy, with a south wind 17 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Breezy.
    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers before noon. Mostly cloudy, with a high near 63. Southwest wind 13 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 63 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a high near 53. East wind around 6 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Patchy fog. Low around 49. East wind around 6 mph becoming south after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. High near 62. South wind 6 to 11 mph becoming west in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers between midnight and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 50. Calm wind becoming south southeast 5 to 9 mph in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 54. Breezy, with a south wind 17 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 50 percent chance of showers before noon. Mostly cloudy, with a high near 63. Southwest wind 13 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 73.
Monday Night
A chance of rain and thunderstorms. Mostly clear, with a low around 58.
Tuesday
Rain. Mostly cloudy, with a high near 73. Breezy.
Tuesday Night
Rain. Mostly cloudy, with a low around 43. Breezy.
Wednesday
Rain likely. Mostly cloudy, with a high near 53. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
3:37 pm CST Mar 4, 2026
Forecast Valid:
4pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation