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

35°F

2°C

Humidity 72%
Wind Speed Calm
Barometer 30.06 in (1018.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 14 Feb 6:54 am CST
Extended Forecast for

Forsyth IL

  • Today

    Today: A 30 percent chance of rain, mainly after 3pm. Cloudy, with a high near 52. South wind 3 to 7 mph.

    High: 52 °F

    Cloudy then
    Chance Rain

  • Tonight

    Tonight: Rain, mainly before 3am. Patchy fog after 2am. Low around 41. South wind 6 to 8 mph becoming east northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain and
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 58. East northeast wind 6 to 8 mph becoming north northwest in the afternoon.

    High: 58 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. Light and variable wind becoming south southwest around 6 mph after midnight.

    Low: 36 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 60. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 60 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind around 10 mph, with gusts as high as 17 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 61. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 61 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52. Breezy.

    Low: 52 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. Breezy.

    High: 66 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Today
A 30 percent chance of rain, mainly after 3pm. Cloudy, with a high near 52. South wind 3 to 7 mph.
Tonight
Rain, mainly before 3am. Patchy fog after 2am. Low around 41. South wind 6 to 8 mph becoming east northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 58. East northeast wind 6 to 8 mph becoming north northwest in the afternoon.
Sunday Night
Mostly clear, with a low around 36. Light and variable wind becoming south southwest around 6 mph after midnight.
Washington's Birthday
Partly sunny, with a high near 60. South southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly cloudy, with a high near 61. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 52. Breezy.
Wednesday
Mostly sunny, with a high near 66. Breezy.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
A chance of rain. Partly sunny, with a high near 60.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
6:36 am CST Feb 14, 2026
Forecast Valid:
7am CST Feb 14, 2026-6pm CST Feb 20, 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