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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog

70°F

21°C

Humidity 97%
Wind Speed NE 5 mph
Barometer 30.06 in (1017.2 mb)
Dewpoint 69°F (21°C)
Visibility 0.15 mi
Last update 14 Jul 5:54 am CDT
Extended Forecast for

Decatur Airport IL

Dense Fog Advisory until July 14, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until July 14, 10:00am

    NOW until 10:00am Mon

    Dense Fog Advisory

  • Today

    High: 87 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 70. Light east southeast wind.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 87. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.

    High: 87 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 72. South southeast wind 5 to 7 mph.

    Low: 72 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Southwest wind 6 to 10 mph.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. South southwest wind around 8 mph.

    Low: 74 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Southwest wind 9 to 11 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Today
Areas of dense fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming east around 5 mph.
Tonight
Partly cloudy, with a low around 70. Light east southeast wind.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 87. Southeast wind 5 to 8 mph. Chance of precipitation is 50%.
Tuesday Night
Mostly cloudy, with a low around 72. South southeast wind 5 to 7 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Southwest wind 6 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74. South southwest wind around 8 mph.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Southwest wind 9 to 11 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 72.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 70.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
5:25 am CDT Jul 14, 2025
Forecast Valid:
6am CDT Jul 14, 2025-6pm CDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation