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.

Light Rain Fog

48°F

9°C

Humidity 100%
Wind Speed SE 7 mph
Barometer 30.00 in (1016.0 mb)
Dewpoint 48°F (9°C)
Visibility 0.50 mi
Wind Chill45°F (7°C)
Last update 4 Mar 8:54 pm CST
Extended Forecast for

3 Miles WSW Forsyth IL

Dense Fog Advisory March 4, 08:59pm until March 5, 06:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 4, 08:59pm until March 5, 06:00am

    NOW until 6:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 48 °F

    Showers and
    Areas Dense
    Fog

  • Thursday

    Thursday: Showers likely, mainly before 10am. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 62. South wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Showers
    Likely and
    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 50. Light and variable wind becoming south southeast 5 to 9 mph in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 13 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.

    High: 76 °F

    Breezy.
    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 54. Breezy, with a south wind 17 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Breezy.
    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers before noon. Mostly cloudy, with a high near 63. Southwest wind 13 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 63 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 16 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Areas of dense fog. Low around 48. Light and variable wind becoming south southeast 5 to 8 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers likely, mainly before 10am. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 62. South wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 50. Light and variable wind becoming south southeast 5 to 9 mph in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. Breezy, with a south wind 13 to 22 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before midnight, then showers and possibly a thunderstorm between midnight and 3am, then showers after 3am. Low around 54. Breezy, with a south wind 17 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 50 percent chance of showers before noon. Mostly cloudy, with a high near 63. Southwest wind 13 to 18 mph becoming west northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 37. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 16 mph.
Sunday
Sunny, with a high near 62.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 73.
Monday Night
A chance of rain and thunderstorms. Mostly clear, with a low around 58.
Tuesday
Rain. Mostly cloudy, with a high near 72. Breezy.
Tuesday Night
Rain. Mostly cloudy, with a low around 43. Breezy.
Wednesday
Rain likely. Mostly cloudy, with a high near 53. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
8:46 pm CST Mar 4, 2026
Forecast Valid:
8pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation