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.

Fog/Mist

70°F

21°C

Humidity 97%
Wind Speed Calm
Barometer 29.96 in (1014.0 mb)
Dewpoint 69°F (21°C)
Visibility 4.00 mi
Last update 26 Jul 5:54 am CDT
Extended Forecast for

Bethany IL

Heat Advisory July 26, 12:00pm until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy dense fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 105. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 89 °F

    Patchy Dense
    Fog then
    Partly Sunny

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 74. South wind around 6 mph.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 92. Heat index values as high as 107. South southeast wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Southwest wind 8 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. North wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Northeast wind 5 to 8 mph.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. North northeast wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

Today
Patchy dense fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 105. Light and variable wind becoming south 5 to 7 mph in the morning.
Tonight
A 10 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 74. South wind around 6 mph.
Monday
Mostly sunny, with a high near 92. Heat index values as high as 107. South southeast wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 74. Southwest wind 8 to 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.
Tuesday
Sunny, with a high near 88. North wind 8 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 63. Northeast wind 5 to 8 mph.
Wednesday
Sunny, with a high near 85. North northeast wind 5 to 9 mph, with gusts as high as 15 mph.
Wednesday Night
Clear, with a low around 61.
Thursday
Sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 64.
Friday
A chance of showers. Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bethany IL
 39.63°N 88.72°W (Elev. 650 ft)
Last Update:
6:26 am CDT Jul 26, 2026
Forecast Valid:
6am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation