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.

Overcast

57°F

14°C

Humidity 96%
Wind Speed S 3 mph
Barometer 29.63 in (1003.0 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 11 Mar 5:54 am CDT
Extended Forecast for

4 Miles N Forsyth IL

  • Today

    Today: Showers and possibly a thunderstorm before 2pm, then a chance of showers. Temperature falling to around 41 by 3pm. Breezy, with a west southwest wind 16 to 24 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F⇓

    Breezy.
    T-storms then
    Showers
    Likely

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 28. Blustery, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.

    Low: 28 °F

    Mostly Clear
    and Blustery
    then Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 49. West wind 7 to 16 mph, with gusts as high as 22 mph.

    High: 49 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 15 to 20 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 38 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 54. Breezy, with a west wind 21 to 28 mph, with gusts as high as 37 mph.

    High: 54 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. West northwest wind 7 to 11 mph becoming east northeast after midnight. Winds could gust as high as 17 mph.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 54. East southeast wind 10 to 15 mph, with gusts as high as 21 mph.

    High: 54 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 45. Breezy.

    Low: 45 °F

    Mostly Cloudy
    then Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Showers. High near 59. Windy. Chance of precipitation is 90%.

    High: 59 °F

    Showers and
    Windy

Detailed Forecast

Today
Showers and possibly a thunderstorm before 2pm, then a chance of showers. Temperature falling to around 41 by 3pm. Breezy, with a west southwest wind 16 to 24 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 28. Blustery, with a northwest wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 31 mph.
Thursday
Increasing clouds, with a high near 49. West wind 7 to 16 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 15 to 20 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 38 mph.
Friday
Partly sunny, with a high near 54. Breezy, with a west wind 21 to 28 mph, with gusts as high as 37 mph.
Friday Night
Mostly cloudy, with a low around 33. West northwest wind 7 to 11 mph becoming east northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 54. East southeast wind 10 to 15 mph, with gusts as high as 21 mph.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 45. Breezy.
Sunday
Showers. High near 59. Windy. Chance of precipitation is 90%.
Sunday Night
A chance of rain and snow showers before 1am. Mostly cloudy, with a low around 20. Blustery. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 31. Blustery.
Monday Night
Partly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 35.
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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:
6:31 am CDT Mar 11, 2026
Forecast Valid:
6am CDT Mar 11, 2026-6pm CDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation