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.

Fair

47°F

8°C

Humidity 74%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 14 May 12:15 am CDT
Extended Forecast for

Altona IL

  • Overnight

    Overnight: Clear, with a low around 44. Light and variable wind.

    Low: 44 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 74. Calm wind becoming south 5 to 9 mph in the morning.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 55. South southeast wind 8 to 15 mph, with gusts as high as 29 mph.

    Low: 55 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 14 to 17 mph, with gusts as high as 31 mph.

    High: 78 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind 6 to 11 mph becoming light south southwest after midnight. Winds could gust as high as 21 mph.

    Low: 61 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely after 1pm. Partly sunny, with a high near 83. Calm wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Partly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 61. Southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Breezy.

    High: 84 °F

    Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 44. Light and variable wind.
Thursday
Sunny, with a high near 74. Calm wind becoming south 5 to 9 mph in the morning.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Increasing clouds, with a low around 55. South southeast wind 8 to 15 mph, with gusts as high as 29 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 78. South wind 14 to 17 mph, with gusts as high as 31 mph.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind 6 to 11 mph becoming light south southwest after midnight. Winds could gust as high as 21 mph.
Saturday
Showers and thunderstorms likely after 1pm. Partly sunny, with a high near 83. Calm wind becoming south 5 to 9 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 61. Southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. Breezy.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 87. Breezy. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. Breezy.
Tuesday
A chance of showers. Mostly cloudy, with a high near 77.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Altona IL
 41.11°N 90.17°W (Elev. 725 ft)
Last Update:
12:16 am CDT May 14, 2026
Forecast Valid:
12am CDT May 14, 2026-6pm CDT May 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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