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.

A Few Clouds

63°F

17°C

Humidity 87%
Wind Speed SW 18 G 29 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 10 Mar 12:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Partly cloudy, with a low around 60. South southwest wind 14 to 16 mph, with gusts as high as 24 mph.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain and thunderstorms, mainly between 1pm and 4pm. Partly sunny, with a high near 78. South southwest wind 13 to 18 mph, with gusts as high as 28 mph.

    High: 78 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 51. Breezy, with a south wind 17 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 51 °F

    T-storms
    Likely and
    Breezy then
    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Temperature rising to near 60 by 10am, then falling to around 44 during the remainder of the day. Breezy, with a southwest wind 17 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 60 °F⇓

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 28 mph.

    Low: 30 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 48. Northwest wind 6 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph.

    High: 48 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy, with a south wind 11 to 16 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 33 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly cloudy, with a high near 55. Breezy.

    High: 55 °F

    Mostly Cloudy
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 60. South southwest wind 14 to 16 mph, with gusts as high as 24 mph.
Tuesday
A 30 percent chance of rain and thunderstorms, mainly between 1pm and 4pm. Partly sunny, with a high near 78. South southwest wind 13 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Rain and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 51. Breezy, with a south wind 17 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 60 by 10am, then falling to around 44 during the remainder of the day. Breezy, with a southwest wind 17 to 22 mph becoming northwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 28 mph.
Thursday
Increasing clouds, with a high near 48. Northwest wind 6 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 17 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 11 to 16 mph increasing to 19 to 24 mph after midnight. Winds could gust as high as 33 mph.
Friday
Mostly cloudy, with a high near 55. Breezy.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly cloudy, with a high near 61.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 45.
Sunday
Rain likely. Mostly cloudy, with a high near 59. Breezy.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Blustery.
Monday
Partly sunny, with a high near 36.
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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:
12:36 am CDT Mar 10, 2026
Forecast Valid:
1am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation