Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

43°F

6°C

Humidity 97%
Wind Speed E 9 mph
Barometer 29.97 in (1015.1 mb)
Dewpoint 42°F (6°C)
Visibility 3.00 mi
Wind Chill38°F (3°C)
Last update 27 Dec 5:54 am CST
Extended Forecast for

3 Miles WSW Forsyth IL

Dense Fog Advisory until December 27, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until December 27, 10:00am

    NOW until 10:00am Sat

    Dense Fog Advisory

  • Today

    High: 55 °F

    Patchy Dense
    Fog then
    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after midnight.  Cloudy, with a temperature rising to around 59 by 4am. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm.  High near 67. Breezy, with a south southwest wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain showers, mixing with snow after 9pm, then gradually ending.  Mostly cloudy, with a low around 15. Wind chill values between -2 and 8. Windy, with a west northwest wind 22 to 32 mph, with gusts as high as 40 mph.  Chance of precipitation is 50%.

    Low: 15 °F

    Chance
    Rain/Snow and
    Blustery then
    Mostly Cloudy
    and Windy

  • Monday

    Monday: Partly sunny, with a high near 24. Windy, with a west northwest wind 23 to 32 mph, with gusts as high as 45 mph.

    High: 24 °F

    Partly Sunny
    and Windy

  • Monday Night

    Monday Night: Mostly clear, with a low around 13. Blustery, with a west northwest wind 15 to 22 mph, with gusts as high as 33 mph.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 29. West wind 11 to 14 mph, with gusts as high as 21 mph.

    High: 29 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy dense fog before 9am. Otherwise, cloudy, with a high near 55. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.
Tonight
A 40 percent chance of showers, mainly after midnight. Cloudy, with a temperature rising to around 59 by 4am. South wind 11 to 13 mph, with gusts as high as 22 mph.
Sunday
Showers likely and possibly a thunderstorm before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 67. Breezy, with a south southwest wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of rain showers, mixing with snow after 9pm, then gradually ending. Mostly cloudy, with a low around 15. Wind chill values between -2 and 8. Windy, with a west northwest wind 22 to 32 mph, with gusts as high as 40 mph. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 24. Windy, with a west northwest wind 23 to 32 mph, with gusts as high as 45 mph.
Monday Night
Mostly clear, with a low around 13. Blustery, with a west northwest wind 15 to 22 mph, with gusts as high as 33 mph.
Tuesday
Mostly sunny, with a high near 29. West wind 11 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 23.
Wednesday
Partly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 16.
New Year's Day
Mostly sunny, with a high near 25.
Thursday Night
Mostly clear, with a low around 9.
Friday
Sunny, with a high near 26.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
3:16 am CST Dec 27, 2025
6am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
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Additional Resources

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