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

63°F

17°C

Humidity 81%
Wind Speed NE 3 mph
Barometer 30.14 in (1020.2 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 23 Jun 1:54 am CDT
Extended Forecast for

Mendon IL

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Calm wind.

    High: 79 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 62. Southeast wind 3 to 6 mph.

    Low: 62 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South wind around 7 mph becoming west in the afternoon.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. West wind 3 to 6 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.

    Low: 64 °F

    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 58. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 62. Southeast wind 3 to 6 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South wind around 7 mph becoming west in the afternoon.
Wednesday Night
Mostly clear, with a low around 64. West wind 3 to 6 mph.
Thursday
A slight chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
Partly sunny, with a high near 85.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 92.
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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:
2:11 am CDT Jun 23, 2026
Forecast Valid:
2am CDT Jun 23, 2026-6pm CDT Jun 29, 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