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

51°F

11°C

Humidity 64%
Wind Speed SE 14 mph
Barometer 29.61 in (1002.5 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 15 Mar 4:54 am CDT
Extended Forecast for

4 Miles N Forsyth IL

Wind Advisory March 15, 10:00am until March 16, 07:00am
Click here for hazard details and duration
Wind Advisory

  • Today

    Today: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 65. Windy, with a south wind 21 to 31 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Windy. Chance
    T-storms then
    Rain

  • Tonight

    Tonight: Rain before 11pm, then a chance of rain and snow between 11pm and midnight, then a chance of snow after midnight. Some thunder is also possible. Patchy blowing snow after midnight. Low around 21. Windy, with a west northwest wind 26 to 32 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 21 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: A 40 percent chance of snow, mainly before 1pm. Patchy blowing snow. Mostly cloudy, with a high near 25. Wind chill values between 2 and 8. Windy, with a west northwest wind 30 to 32 mph, with gusts as high as 44 mph.

    High: 25 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. Wind chill values between -6 and 4. Blustery, with a west northwest wind 17 to 23 mph, with gusts as high as 32 mph.

    Low: 10 °F

    Mostly Cloudy
    and Blustery

  • Tuesday

    Tuesday: Mostly sunny, with a high near 29. West northwest wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 29 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 24. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    Low: 24 °F

    Chance Snow
    then Snow
    Likely

  • Wednesday

    Wednesday: Mostly sunny, with a high near 53. South wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 53 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 65. Windy, with a south wind 21 to 31 mph, with gusts as high as 48 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Rain before 11pm, then a chance of rain and snow between 11pm and midnight, then a chance of snow after midnight. Some thunder is also possible. Patchy blowing snow after midnight. Low around 21. Windy, with a west northwest wind 26 to 32 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Monday
A 40 percent chance of snow, mainly before 1pm. Patchy blowing snow. Mostly cloudy, with a high near 25. Wind chill values between 2 and 8. Windy, with a west northwest wind 30 to 32 mph, with gusts as high as 44 mph.
Monday Night
Mostly cloudy, with a low around 10. Wind chill values between -6 and 4. Blustery, with a west northwest wind 17 to 23 mph, with gusts as high as 32 mph.
Tuesday
Mostly sunny, with a high near 29. West northwest wind 9 to 14 mph, with gusts as high as 20 mph.
Tuesday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 24. South wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 53. South wind 15 to 18 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Partly sunny, with a high near 68.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Partly sunny, with a high near 61.
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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:
4:36 am CDT Mar 15, 2026
Forecast Valid:
5am CDT Mar 15, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation