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

36°F

2°C

Humidity 73%
Wind Speed NW 10 mph
Barometer 30.22 in (1023.7 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 11 Mar 11:54 pm CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Clear, with a low around 28. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.

    Low: 28 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. West wind 7 to 15 mph, with gusts as high as 20 mph.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. 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: 40 °F

    Mostly Cloudy
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 53. Breezy, with a west wind 20 to 24 mph, with gusts as high as 33 mph.

    High: 53 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 32. West northwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.

    Low: 32 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 52. East southeast wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 52 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 44. Breezy, with an east wind 13 to 20 mph, with gusts as high as 26 mph.

    Low: 44 °F

    Cloudy then
    Cloudy and
    Breezy

  • Sunday

    Sunday: Rain. High near 61. Breezy. Chance of precipitation is 90%.

    High: 61 °F

    Breezy. Rain
    Likely then
    Rain

  • Sunday Night

    Sunday Night: A chance of rain and snow before 1am. Mostly cloudy, with a low around 20. Windy. Chance of precipitation is 50%.

    Low: 20 °F

    Chance
    Rain/Snow and
    Windy

Detailed Forecast

Overnight
Clear, with a low around 28. Northwest wind 9 to 15 mph, with gusts as high as 24 mph.
Thursday
Increasing clouds, with a high near 50. West wind 7 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 40. 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 sunny, with a high near 53. Breezy, with a west wind 20 to 24 mph, with gusts as high as 33 mph.
Friday Night
Mostly cloudy, with a low around 32. West northwest wind 7 to 10 mph becoming north northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 52. East southeast wind 8 to 13 mph, with gusts as high as 18 mph.
Saturday Night
Cloudy, with a low around 44. Breezy, with an east wind 13 to 20 mph, with gusts as high as 26 mph.
Sunday
Rain. High near 61. Breezy. Chance of precipitation is 90%.
Sunday Night
A chance of rain and snow before 1am. Mostly cloudy, with a low around 20. Windy. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 29. Blustery.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
Mostly cloudy, with a high near 48.
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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:
8:37 pm CDT Mar 11, 2026
Forecast Valid:
12am CDT Mar 12, 2026-6pm CDT Mar 18, 2026
 
Forecast Discussion
 
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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