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

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Thunderstorm in Vicinity

71°F

22°C

Humidity 96%
Wind Speed E 9 mph
Barometer 29.96 in (1014.3 mb)
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 15 Oct 10:54 am CDT
Extended Forecast for

Hamburg IL

  • Today

    Today: Showers and thunderstorms likely, mainly before 4pm. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 78. Southeast wind 7 to 9 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 9 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely then
    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers, mainly after 4pm. Partly sunny, with a high near 55. Northwest wind 15 to 18 mph, with gusts as high as 32 mph.

    High: 55 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 37. North wind 6 to 15 mph, with gusts as high as 30 mph.

    Low: 37 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, mainly before 4pm. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 78. Southeast wind 7 to 9 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Tonight
Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 9 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers, mainly after 4pm. Partly sunny, with a high near 55. Northwest wind 15 to 18 mph, with gusts as high as 32 mph.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 37. North wind 6 to 15 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 59. Light and variable wind.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hamburg IL
 39.23°N 90.69°W (Elev. 676 ft)
Last Update:
11:21 am CDT Oct 15, 2026
Forecast Valid:
11am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation