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.

Light Rain

83°F

28°C

Humidity 78%
Wind Speed S 3 mph
Barometer 30.08 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 15 Aug 11:35 am CDT
Extended Forecast for

Delavan IL

Flood Warning August 15, 11:42am until August 15, 06:00pm
Click here for hazard details and duration
Flood Warning
  •  
    Flood Warning August 15, 11:42am until August 15, 06:00pm

    NOW until 6:00pm Sat

    Flood Warning

  • Today

    High: 86 °F

    Showers
    Likely

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph after midnight.

    Low: 73 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 2pm. Partly sunny, with a high near 87. West northwest wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. North northwest wind 3 to 8 mph. Winds could gust as high as 15 mph.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 83. North wind around 5 mph.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. Light and variable wind.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind becoming south southwest around 6 mph in the morning.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Today
Showers likely, mainly before noon. Mostly cloudy, with a high near 86. Southwest wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 73. Calm wind becoming south around 5 mph after midnight.
Sunday
A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 2pm. Partly sunny, with a high near 87. West northwest wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 67. North northwest wind 3 to 8 mph. Winds could gust as high as 15 mph.
Monday
Sunny, with a high near 83. North wind around 5 mph.
Monday Night
Mostly clear, with a low around 63. Light and variable wind.
Tuesday
Sunny, with a high near 84. Calm wind becoming south southwest around 6 mph in the morning.
Tuesday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Wednesday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Delavan IL
 40.37°N 89.55°W (Elev. 600 ft)
Last Update:
11:01 am CDT Aug 15, 2026
Forecast Valid:
11am CDT Aug 15, 2026-6pm CDT Aug 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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