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

40°F

4°C

Humidity 65%
Wind Speed S 12 mph
Barometer 29.94 in (1014.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 13 Jan 1:54 am CST
Extended Forecast for

Mendon IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. Southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of rain after 5pm. Increasing clouds, with a high near 56. West wind around 14 mph, with gusts as high as 25 mph.

    High: 56 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 8pm. Mostly cloudy, with a low around 32. Northwest wind 11 to 17 mph, with gusts as high as 26 mph.

    Low: 32 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 29 by 5pm. Breezy, with a north wind 20 to 23 mph, with gusts as high as 37 mph.

    High: 35 °F⇓

    Decreasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 15. North wind 9 to 16 mph, with gusts as high as 26 mph.

    Low: 15 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday

    Friday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 36. Southwest wind around 11 mph, with gusts as high as 21 mph.
Tuesday
A 20 percent chance of rain after 5pm. Increasing clouds, with a high near 56. West wind around 14 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of rain before 8pm. Mostly cloudy, with a low around 32. Northwest wind 11 to 17 mph, with gusts as high as 26 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a temperature falling to around 29 by 5pm. Breezy, with a north wind 20 to 23 mph, with gusts as high as 37 mph.
Wednesday Night
Mostly clear, with a low around 15. North wind 9 to 16 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 31.
Thursday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 27.
Friday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 39.
Friday Night
Mostly cloudy, with a low around 15.
Saturday
Mostly cloudy, with a high near 23.
Saturday Night
Partly cloudy, with a low around 7.
Sunday
Mostly sunny, with a high near 21.
Sunday Night
Partly cloudy, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 31.
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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:
12:21 am CST Jan 13, 2026
Forecast Valid:
2am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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