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.

Mostly Cloudy

5°F

-15°C

Humidity 66%
Wind Speed NW 18 G 38 mph
Barometer 30.26 in (1026.2 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-15°F (-26°C)
Last update 19 Jan 7:54 am CST
Extended Forecast for

3 Miles WSW Forsyth IL

Cold Weather Advisory until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory until January 19, 12:00pm

    NOW until 12:00pm Mon

    Cold Weather Advisory

  • M.L.King Day

    High: 13 °F

    Sunny and
    Blustery

  • Tonight

    Tonight: Partly cloudy, with a low around 7. Wind chill values between -1 and -6. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 7 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 30. Wind chill values between -1 and 9. South southwest wind 6 to 11 mph, with gusts as high as 16 mph.

    High: 30 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 28 mph.

    Low: 24 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. Breezy, with a west wind 11 to 20 mph, with gusts as high as 28 mph.

    High: 38 °F

    Partly Sunny
    and Breezy
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18. West northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

M.L.King Day
Sunny, with a high near 13. Wind chill values between -6 and -16. Blustery, with a west northwest wind 13 to 21 mph, with gusts as high as 34 mph.
Tonight
Partly cloudy, with a low around 7. Wind chill values between -1 and -6. Southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Tuesday
Mostly sunny, with a high near 30. Wind chill values between -1 and 9. South southwest wind 6 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 24. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 28 mph.
Wednesday
Mostly sunny, with a high near 38. Breezy, with a west wind 11 to 20 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 18. West northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 29. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Mostly cloudy, with a high near 18.
Friday Night
Mostly cloudy, with a low around -4.
Saturday
Partly sunny and cold, with a high near 10.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 2.
Sunday
Mostly sunny, with a high near 20.
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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:
8:37 am CST Jan 19, 2026
Forecast Valid:
8am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation