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

Quincy Regional Airport-Baldwin Field (KUIN)

Lat: 39.94°NLon: 91.2°WElev: 759ft.

Fair

67°F

19°C

Humidity 57%
Wind Speed E 6 mph
Barometer 30.03 in (1016.5 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 28 Sep 7:54 pm CDT
Extended Forecast for

Mendon IL

  • Tonight

    Tonight: Mostly clear, with a low around 55. Light southeast wind.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. South wind 5 to 8 mph.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 67. South wind 7 to 9 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly between 7am and 1pm. Mostly cloudy, with a high near 81. South wind around 9 mph.

    High: 81 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 70. South wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 90%.

    High: 75 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 55. Light southeast wind.
Tuesday
Mostly sunny, with a high near 81. South wind 5 to 8 mph.
Tuesday Night
Increasing clouds, with a low around 67. South wind 7 to 9 mph.
Wednesday
A 30 percent chance of showers, mainly between 7am and 1pm. Mostly cloudy, with a high near 81. South wind around 9 mph.
Wednesday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 70. South wind 7 to 9 mph, with gusts as high as 20 mph.
Thursday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 67.
Friday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 55.
Saturday
A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 69.
Saturday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 56.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 52.
Monday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mendon IL
 40.08°N 91.29°W (Elev. 702 ft)
Last Update:
6:01 pm CDT Sep 28, 2026
Forecast Valid:
8pm CDT Sep 28, 2026-6pm CDT Oct 5, 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