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.

Fair

34°F

1°C

Humidity 76%
Wind Speed NW 9 mph
Barometer 30.24 in (1024.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 12 Mar 1:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Clear, with a low around 29. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 29 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. West wind 7 to 14 mph, with gusts as high as 20 mph.

    High: 50 °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 23 to 28 mph after midnight. Winds could gust as high as 43 mph.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 54. Breezy, with a west wind 22 to 26 mph, with gusts as high as 43 mph.

    High: 54 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 33. West northwest wind 6 to 11 mph becoming northeast after midnight. Winds could gust as high as 23 mph.

    Low: 33 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 54. East southeast wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 47. East southeast wind 13 to 18 mph, with gusts as high as 28 mph.

    Low: 47 °F

    Cloudy

  • Sunday

    Sunday: Rain. High near 63. Breezy. Chance of precipitation is 90%.

    High: 63 °F

    Breezy. Rain
    Likely then
    Rain

  • Sunday Night

    Sunday Night: Rain and snow likely before 1am, then a chance of snow. Cloudy, with a low around 20. Windy. Chance of precipitation is 70%.

    Low: 20 °F

    Rain/Snow
    Likely and
    Windy

Detailed Forecast

Overnight
Clear, with a low around 29. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.
Thursday
Increasing clouds, with a high near 50. West wind 7 to 14 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 41. Breezy, with a south wind 15 to 20 mph increasing to 23 to 28 mph after midnight. Winds could gust as high as 43 mph.
Friday
Partly sunny, with a high near 54. Breezy, with a west wind 22 to 26 mph, with gusts as high as 43 mph.
Friday Night
Mostly cloudy, with a low around 33. West northwest wind 6 to 11 mph becoming northeast after midnight. Winds could gust as high as 23 mph.
Saturday
Mostly cloudy, with a high near 54. East southeast wind 9 to 14 mph, with gusts as high as 20 mph.
Saturday Night
Cloudy, with a low around 47. East southeast wind 13 to 18 mph, with gusts as high as 28 mph.
Sunday
Rain. High near 63. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain and snow likely before 1am, then a chance of snow. Cloudy, with a low around 20. Windy. Chance of precipitation is 70%.
Monday
Mostly cloudy, with a high near 26. Windy.
Monday Night
Partly cloudy, with a low around 11. Blustery.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 23.
Wednesday
Partly sunny, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
1:26 am CDT Mar 12, 2026
Forecast Valid:
2am CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation