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.

Overcast

19°F

-7°C

Humidity 71%
Wind Speed SW 7 mph
Barometer 29.98 in (1016.3 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 18 Jan 7:54 pm CST
Extended Forecast for

4 Miles N Forsyth IL

Cold Weather Advisory January 19, 03:00am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: A chance of flurries with a slight chance of snow before 9pm, then a chance of flurries between 9pm and 11pm. Mostly cloudy, with a low around 4. Wind chill values between -4 and -14. Blustery, with a southwest wind 11 to 16 mph becoming west northwest 19 to 24 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 20%.

    Low: 4 °F

    Slight Chance
    Snow then
    Mostly Cloudy
    and Blustery

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 13. Wind chill values between -7 and -17. Blustery, with a west northwest wind 14 to 24 mph, with gusts as high as 34 mph.

    High: 13 °F

    Mostly Sunny
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 6. Wind chill values between -1 and -7. West southwest wind 6 to 13 mph, with gusts as high as 17 mph.

    Low: 6 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28. Wind chill values between -3 and 7. West southwest wind 7 to 11 mph, with gusts as high as 16 mph.

    High: 28 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a temperature rising to around 30 by 5am. South wind 8 to 18 mph, with gusts as high as 25 mph.

    Low: 24 °F⇑

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 38. Southwest wind 11 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 38 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 17. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.

    Low: 17 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 27.

    High: 27 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of flurries with a slight chance of snow before 9pm, then a chance of flurries between 9pm and 11pm. Mostly cloudy, with a low around 4. Wind chill values between -4 and -14. Blustery, with a southwest wind 11 to 16 mph becoming west northwest 19 to 24 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 20%.
M.L.King Day
Mostly sunny, with a high near 13. Wind chill values between -7 and -17. Blustery, with a west northwest wind 14 to 24 mph, with gusts as high as 34 mph.
Monday Night
Partly cloudy, with a low around 6. Wind chill values between -1 and -7. West southwest wind 6 to 13 mph, with gusts as high as 17 mph.
Tuesday
Mostly sunny, with a high near 28. Wind chill values between -3 and 7. West southwest wind 7 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a temperature rising to around 30 by 5am. South wind 8 to 18 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 38. Southwest wind 11 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 17. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 27.
Thursday Night
Partly cloudy, with a low around 15.
Friday
Partly sunny, with a high near 29.
Friday Night
A chance of snow. Mostly cloudy, with a low around 8.
Saturday
A chance of snow. Mostly cloudy, with a high near 19.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 0.
Sunday
Partly sunny, with a high near 14.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
8:32 pm CST Jan 18, 2026
Forecast Valid:
8pm CST Jan 18, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation