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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Chestnut IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Today

    Today: A 20 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 80. West northwest wind 3 to 7 mph.

    High: 80 °F

    Slight Chance
    Showers then
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Calm wind becoming east around 6 mph after midnight.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. Some of the storms could produce heavy rainfall. High near 74. East southeast wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 74 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 59. South wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 59 °F

    T-storms then
    Showers

  • Monday

    Monday: Partly sunny, with a high near 75. North northeast wind around 14 mph, with gusts as high as 21 mph.

    High: 75 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. Northeast wind 5 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. North northeast wind around 5 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 80. West northwest wind 3 to 7 mph.
Tonight
Partly cloudy, with a low around 61. Calm wind becoming east around 6 mph after midnight.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. Some of the storms could produce heavy rainfall. High near 74. East southeast wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Sunday Night
Showers and possibly a thunderstorm. Low around 59. South wind 13 to 16 mph becoming north after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Partly sunny, with a high near 75. North northeast wind around 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 55. Northeast wind 5 to 9 mph.
Tuesday
Sunny, with a high near 77. North northeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 59.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chestnut IL
 40.07°N 89.22°W (Elev. 623 ft)
Last Update:
4:36 am CDT Jun 20, 2026
Forecast Valid:
6am CDT Jun 20, 2026-6pm CDT Jun 26, 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