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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Galesburg Municipal Airport (KGBG)

Lat: 40.93°NLon: 90.43°WElev: 751ft.

Overcast

68°F

20°C

Humidity 100%
Wind Speed NE 8 mph
Barometer 30.23 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Sep 2:15 am CDT
Extended Forecast for

Galva IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 68. Northeast wind around 10 mph.

    Low: 68 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers between 11am and 3pm. Partly sunny, with a high near 76. Northeast wind around 10 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 3am, then showers likely and possibly a thunderstorm after 5am. Partly cloudy, with a low around 65. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and thunderstorms before noon, then a slight chance of showers between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 81. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm, then showers after 1am. Low around 65. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 65 °F

    Showers
    Likely then
    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 1pm. High near 71. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely

  • Monday

    Monday: Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 68. Northeast wind around 10 mph.
Friday
A 20 percent chance of showers between 11am and 3pm. Partly sunny, with a high near 76. Northeast wind around 10 mph.
Friday Night
Showers and thunderstorms likely, mainly before 3am, then showers likely and possibly a thunderstorm after 5am. Partly cloudy, with a low around 65. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Saturday
Showers and thunderstorms before noon, then a slight chance of showers between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. High near 81. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers likely and possibly a thunderstorm, then showers after 1am. Low around 65. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Showers, with thunderstorms also possible after 1pm. High near 71. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Monday
Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
Mostly sunny, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Galva IL
 41.17°N 90.06°W (Elev. 823 ft)
Last Update:
1:26 am CDT Sep 18, 2026
Forecast Valid:
2am CDT Sep 18, 2026-6pm CDT Sep 24, 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