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.

Light Rain Fog/Mist

43°F

6°C

Humidity 97%
Wind Speed E 10 mph
Barometer 29.93 in (1013.8 mb)
Dewpoint 42°F (6°C)
Visibility 6.00 mi
Wind Chill37°F (3°C)
Last update 15 Feb 12:54 am CST
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Rain likely, mainly before 3am. Patchy fog after 4am. Otherwise, cloudy, with a low around 39. Northeast wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Rain Likely
    and Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 56. North northeast wind 6 to 8 mph becoming west in the afternoon.

    High: 56 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 38. Southwest wind 5 to 7 mph.

    Low: 38 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 61. South southwest wind 7 to 17 mph, with gusts as high as 24 mph.

    High: 61 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. South wind around 10 mph, with gusts as high as 17 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 61. Breezy, with a south southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 61 °F

    Mostly Cloudy
    then Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 18 to 23 mph, with gusts as high as 34 mph.

    Low: 54 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 68. Breezy.

    High: 68 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain likely, mainly before 3am. Patchy fog after 4am. Otherwise, cloudy, with a low around 39. Northeast wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 56. North northeast wind 6 to 8 mph becoming west in the afternoon.
Sunday Night
Increasing clouds, with a low around 38. Southwest wind 5 to 7 mph.
Washington's Birthday
Partly sunny, with a high near 61. South southwest wind 7 to 17 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 41. South wind around 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly cloudy, with a high near 61. Breezy, with a south southeast wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 18 to 23 mph, with gusts as high as 34 mph.
Wednesday
Sunny, with a high near 68. Breezy.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
A 40 percent chance of rain after noon. Mostly sunny, with a high near 65.
Thursday Night
A chance of rain. Mostly clear, with a low around 35.
Friday
Partly sunny, with a high near 48.
Friday Night
Mostly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 44.
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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:
1:16 am CST Feb 15, 2026
Forecast Valid:
1am CST Feb 15, 2026-6pm CST Feb 21, 2026
 
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Additional Resources

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Chance of Precipitation