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.

Fog/Mist

37°F

3°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 37°F (3°C)
Visibility 5.00 mi
Last update 15 Feb 3:35 am CST
Extended Forecast for

Monmouth IL

  • Overnight

    Overnight: Patchy fog. Otherwise, cloudy, with a steady temperature around 36. West wind around 5 mph.

    Low: 36 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind 5 to 10 mph.

    High: 59 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 39. Light and variable wind becoming southwest 5 to 10 mph in the evening.

    Low: 39 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 65. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight. Partly cloudy, with a low around 53. Breezy.

    Low: 53 °F

    Breezy.
    Partly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Sunny, with a high near 65. Breezy.

    High: 65 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, cloudy, with a steady temperature around 36. West wind around 5 mph.
Sunday
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 59. Northwest wind 5 to 10 mph.
Sunday Night
Increasing clouds, with a low around 39. Light and variable wind becoming southwest 5 to 10 mph in the evening.
Washington's Birthday
Mostly sunny, with a high near 65. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
Mostly cloudy, with a high near 63.
Tuesday Night
A 30 percent chance of rain after midnight. Partly cloudy, with a low around 53. Breezy.
Wednesday
Sunny, with a high near 65. Breezy.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 58.
Thursday Night
A 30 percent chance of rain. Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 42.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Monmouth IL
 40.92°N 90.62°W (Elev. 719 ft)
Last Update:
3:16 am CST Feb 15, 2026
Forecast Valid:
3am CST Feb 15, 2026-6pm CST Feb 21, 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