National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

54°F

12°C

Humidity 72%
Wind Speed Calm
Barometer 29.93 in (1013.6 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 Feb 1:54 pm CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. West wind around 8 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 39. Southwest wind 5 to 7 mph.

    Low: 39 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 62 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. South wind around 10 mph, with gusts as high as 16 mph.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 60 °F

    Mostly Cloudy
    then Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 18 to 24 mph, with gusts as high as 33 mph.

    Low: 54 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 68. Breezy, with a west southwest wind 14 to 23 mph, with gusts as high as 32 mph.

    High: 68 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 58. West wind around 8 mph.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 39. Southwest wind 5 to 7 mph.
Washington's Birthday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 40. South wind around 10 mph, with gusts as high as 16 mph.
Tuesday
Mostly cloudy, with a high near 60. Breezy, with a south wind 9 to 14 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 29 mph.
Tuesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Breezy, with a south wind 18 to 24 mph, with gusts as high as 33 mph.
Wednesday
Sunny, with a high near 68. Breezy, with a west southwest wind 14 to 23 mph, with gusts as high as 32 mph.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 67.
Thursday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 49.
Friday Night
A chance of rain. Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 45.
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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:
1:21 pm CST Feb 15, 2026
Forecast Valid:
2pm CST Feb 15, 2026-6pm CST Feb 21, 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