Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Galesburg Municipal Airport (KGBG)

Lat: 40.93°NLon: 90.43°WElev: 751ft.

Fog/Mist

67°F

19°C

Humidity 100%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 67°F (19°C)
Visibility 4.00 mi
Last update 20 Aug 1:55 am CDT
Extended Forecast for

4 Miles SSE Monmouth IL

  • Overnight

    Overnight: Patchy fog after 4am.  Otherwise, partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am.  Otherwise, sunny, with a high near 80. East wind around 5 mph becoming calm  in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Calm wind becoming south around 5 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 82. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers before 10pm.  Partly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 63. Calm wind.
Thursday
Patchy fog before 8am. Otherwise, sunny, with a high near 80. East wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly clear, with a low around 62. Calm wind becoming south around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 82. Light south wind becoming southwest 5 to 10 mph in the morning.
Friday Night
A 30 percent chance of showers before 10pm. Partly cloudy, with a low around 64.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Monmouth IL
 40.86°N 90.62°W (Elev. 774 ft)
1:26 am CDT Aug 20, 2026
2am CDT Aug 20, 2026-6pm CDT Aug 26, 2026
 
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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