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.

Fair

59°F

15°C

Humidity 96%
Wind Speed SW 14 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 10 Mar 5:54 am CDT
Extended Forecast for

4 Miles N Forsyth IL

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 26 mph.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 53. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 53 °F

    Chance
    T-storms and
    Breezy then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 44 by 5pm. Breezy, with a west southwest wind 18 to 25 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 61 °F⇓

    Breezy.
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming clear, with a low around 29. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 29 mph.

    Low: 29 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. Northwest wind 6 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 37 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 56. Breezy, with a southwest wind 18 to 25 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.

    High: 56 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 60. Breezy.

    High: 60 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 26 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4am. Low around 53. Breezy, with a south southwest wind 18 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. Temperature falling to around 44 by 5pm. Breezy, with a west southwest wind 18 to 25 mph becoming northwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
Mostly cloudy, then gradually becoming clear, with a low around 29. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 29 mph.
Thursday
Increasing clouds, with a high near 50. Northwest wind 6 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 37 mph.
Friday
Mostly cloudy, with a high near 56. Breezy, with a southwest wind 18 to 25 mph becoming west northwest in the afternoon. Winds could gust as high as 34 mph.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Mostly cloudy, with a high near 60. Breezy.
Saturday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 44. Breezy.
Sunday
Rain. Cloudy, with a high near 56. Breezy.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 19. Blustery.
Monday
Partly sunny, with a high near 32. Breezy.
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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:
4:36 am CDT Mar 10, 2026
Forecast Valid:
6am CDT Mar 10, 2026-6pm CDT Mar 16, 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