National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Logan County Airport (KAAA)

Lat: 40.16°NLon: 89.34°WElev: 591ft.

Overcast

72°F

22°C

Humidity 100%
Wind Speed S 5 mph
Barometer 30.02 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 25 Jul 11:35 am CDT
Extended Forecast for

Chestnut IL

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

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 81. South southwest wind 6 to 8 mph.

    High: 81 °F

    Chance
    Showers

  • Tonight

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

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming south southwest 5 to 7 mph in the morning.

    High: 91 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 74. South wind 5 to 8 mph.

    Low: 74 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 94. Southwest wind 8 to 15 mph, with gusts as high as 22 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. South southwest wind 8 to 13 mph becoming northwest after midnight. Winds could gust as high as 18 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. North wind 8 to 11 mph, with gusts as high as 16 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly before noon. Mostly cloudy, with a high near 81. South southwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 70. Light southeast wind.
Sunday
Partly sunny, with a high near 91. Heat index values as high as 105. Light and variable wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
Partly cloudy, with a low around 74. South wind 5 to 8 mph.
Monday
Sunny, with a high near 94. Southwest wind 8 to 15 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 74. South southwest wind 8 to 13 mph becoming northwest after midnight. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 89. North wind 8 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chestnut IL
 40.05°N 89.22°W (Elev. 627 ft)
Last Update:
10:36 am CDT Jul 25, 2026
Forecast Valid:
11am CDT Jul 25, 2026-6pm CDT Jul 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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