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

Galesburg Municipal Airport (KGBG)

Lat: 40.93°NLon: 90.43°WElev: 751ft.

Partly Cloudy

38°F

3°C

Humidity 73%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 13 Mar 8:35 pm CDT
Extended Forecast for

Monmouth IL

  • Tonight

    Tonight: A 10 percent chance of snow after 5am. Mostly cloudy, with a low around 31. Northwest wind around 5 mph becoming northeast after midnight.

    Low: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 10 percent chance of snow before 7am. Mostly cloudy, with a high near 50. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of rain, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 44. East wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 44 °F

    Chance Rain

  • Sunday

    Sunday: Rain likely and possibly a thunderstorm before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 65. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain and snow, becoming all snow after 10pm. Widespread blowing snow, mainly after 4am. Low around 16. Windy. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 16 °F

    Rain/Snow and
    Patchy
    Blowing Snow
    then Snow and
    Blowing Snow

  • Monday

    Monday: A 40 percent chance of snow before 1pm. Widespread blowing snow, mainly before 7am. Mostly cloudy, with a high near 21. Windy.

    High: 21 °F

    Chance Snow
    and Blowing
    Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 5. Blustery.

    Low: 5 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.

    Low: 21 °F

    Snow Likely

Detailed Forecast

Tonight
A 10 percent chance of snow after 5am. Mostly cloudy, with a low around 31. Northwest wind around 5 mph becoming northeast after midnight.
Saturday
A 10 percent chance of snow before 7am. Mostly cloudy, with a high near 50. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
A chance of rain, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 44. East wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Sunday
Rain likely and possibly a thunderstorm before 1pm, then rain between 1pm and 4pm, then rain and possibly a thunderstorm after 4pm. High near 65. Breezy, with a south wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain and snow, becoming all snow after 10pm. Widespread blowing snow, mainly after 4am. Low around 16. Windy. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Monday
A 40 percent chance of snow before 1pm. Widespread blowing snow, mainly before 7am. Mostly cloudy, with a high near 21. Windy.
Monday Night
Partly cloudy, with a low around 5. Blustery.
Tuesday
Mostly sunny, with a high near 28.
Tuesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 52.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Mostly sunny, with a high near 60.
Thursday Night
Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth IL
 40.92°N 90.65°W (Elev. 751 ft)
Last Update:
8:52 pm CDT Mar 13, 2026
Forecast Valid:
8pm CDT Mar 13, 2026-6pm CDT Mar 20, 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