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 Calm
Barometer 30.00 in (1016.2 mb)
Dewpoint 48°F (9°C)
Visibility 0.25 mi
Last update 4 Mar 7:54 pm CST
Extended Forecast for

6 Miles WSW Bethany IL

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

    NOW until 6:00am Thu

    Dense Fog Advisory

  • Tonight

    Low: 51 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. High near 63. Southwest wind 6 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers 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 51. Light and variable wind becoming south southeast 5 to 9 mph after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms. Partly sunny, with a high near 75. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

    High: 75 °F

    Breezy.
    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 55. Breezy, with a south wind 15 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Chance
    T-storms then
    Showers and
    Breezy

  • Saturday

    Saturday: Showers likely before noon. Mostly cloudy, with a high near 63. Southwest wind 11 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38. Northwest wind 5 to 9 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Patchy fog. Low around 51. East wind 5 to 7 mph becoming southwest after midnight. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Showers and thunderstorms before 11am, then a slight chance of showers between 11am and noon. Patchy fog before noon. High near 63. Southwest wind 6 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 51. Light and variable wind becoming south southeast 5 to 9 mph after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 75. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers before 9pm, then a chance of showers and thunderstorms between 9pm and midnight, then showers and possibly a thunderstorm after midnight. Low around 55. Breezy, with a south wind 15 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely before noon. Mostly cloudy, with a high near 63. Southwest wind 11 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Partly cloudy, with a low around 38. Northwest wind 5 to 9 mph.
Sunday
Sunny, with a high near 61.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 72.
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 45. Breezy.
Wednesday
Rain likely. Mostly cloudy, with a high near 55. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles WSW Bethany IL
 39.62°N 88.84°W (Elev. 689 ft)
Last Update:
6:36 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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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