Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Current conditions at

Quincy Regional Airport-Baldwin Field (KUIN)

Lat: 39.94°NLon: 91.2°WElev: 759ft.

Fair

88°F

31°C

Humidity 73%
Wind Speed SW 6 mph
Barometer 29.86 in (1010.1 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 11 Aug 6:54 pm CDT
Extended Forecast for

Mendon IL

Heat Advisory August 11, 07:02pm until August 12, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 11, 07:02pm until August 12, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly between 4pm and 5pm.  Partly sunny, with a high near 90. Heat index values as high as 101. Southeast wind around 9 mph becoming east in the afternoon.  Chance of precipitation is 40%.

    High: 90 °F

    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly after 11pm.  Partly cloudy, with a low around 73. East wind around 7 mph.  Chance of precipitation is 40%.

    Low: 73 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 88. East wind around 8 mph becoming south in the afternoon.  Chance of precipitation is 60%.

    High: 88 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 71. Northeast wind 8 to 10 mph.  Chance of precipitation is 70%.

    Low: 71 °F

    Showers
    Likely

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 88.

    High: 88 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers, with thunderstorms also possible after 1am.  Partly cloudy, with a low around 73. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. South wind 5 to 7 mph.
Wednesday
Scattered showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 90. Heat index values as high as 101. Southeast wind around 9 mph becoming east in the afternoon. Chance of precipitation is 40%.
Wednesday Night
Scattered showers and thunderstorms, mainly after 11pm. Partly cloudy, with a low around 73. East wind around 7 mph. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. East wind around 8 mph becoming south in the afternoon. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Northeast wind 8 to 10 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 88.
Friday Night
A slight chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 93.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75.
Sunday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 85.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Mendon IL
 40.08°N 91.29°W (Elev. 702 ft)
5:06 pm CDT Aug 11, 2026
7pm CDT Aug 11, 2026-6pm CDT Aug 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

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