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.

Overcast

68°F

20°C

Humidity 96%
Wind Speed Calm
Barometer 30.05 in (1017.2 mb)
Dewpoint 67°F (19°C)
Visibility 7.00 mi
Last update 15 Oct 1:54 am CDT
Extended Forecast for

2 Miles SW Hamburg IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog between 9am and noon. High near 79. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 79 °F

    Showers and
    Patchy Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 11pm, then isolated showers between 11pm and midnight. Mostly cloudy, with a low around 46. Northwest wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely then
    Mostly Cloudy

  • Friday

    Friday: Isolated showers between 3pm and 4pm. Partly sunny, with a high near 57. Northwest wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 57 °F

    Mostly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. North wind 5 to 15 mph, with gusts as high as 29 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 37.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Sunday Night

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

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 65. Calm wind.
Thursday
Showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog between 9am and noon. High near 79. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Thursday Night
Showers and thunderstorms likely before 11pm, then isolated showers between 11pm and midnight. Mostly cloudy, with a low around 46. Northwest wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday
Isolated showers between 3pm and 4pm. Partly sunny, with a high near 57. Northwest wind 14 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 38. North wind 5 to 15 mph, with gusts as high as 29 mph.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Hamburg IL
 39.21°N 90.75°W (Elev. 446 ft)
Last Update:
1:26 am CDT Oct 15, 2026
Forecast Valid:
2am CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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