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.

Fair

75°F

24°C

Humidity 100%
Wind Speed S 7 mph
Barometer 30.01 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 9 Aug 8:15 am CDT
Extended Forecast for

Delavan IL

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 101. South wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 90 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    Showers

  • Monday

    Monday: A slight chance of showers before 9am, then a slight chance of showers and thunderstorms between 9am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southwest wind 5 to 7 mph. Chance of precipitation is 40%.

    Low: 75 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90. Southwest wind 6 to 8 mph, with gusts as high as 15 mph.

    High: 90 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 73. Light and variable wind becoming west northwest around 6 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. South wind 5 to 7 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 101. South wind 7 to 15 mph, with gusts as high as 24 mph.
Tonight
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Monday
A slight chance of showers before 9am, then a slight chance of showers and thunderstorms between 9am and 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. South southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. South southwest wind 5 to 7 mph. Chance of precipitation is 40%.
Tuesday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90. Southwest wind 6 to 8 mph, with gusts as high as 15 mph.
Tuesday Night
Showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 73. Light and variable wind becoming west northwest around 6 mph after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. South wind 5 to 7 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 64.
Friday
A chance of showers. Partly sunny, with a high near 78.
Friday Night
A chance of showers. Mostly cloudy, with a low around 64.
Saturday
A chance of showers. Partly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Delavan IL
 40.37°N 89.55°W (Elev. 600 ft)
Last Update:
5:55 am CDT Aug 9, 2026
Forecast Valid:
8am CDT Aug 9, 2026-6pm CDT Aug 15, 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