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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

28°C

82°F

Humidity 69%
Wind Speed Calm
Barometer 1013.7 mb (29.95 in)
Dewpoint 22°C (71°F)
Visibility 16 km
Heat Index30°C (86°F)
Last update 12 Jul 7:54 pm CDT
Extended Forecast for

2 Miles SW Brussels IL

  • Tonight

    Tonight: Partly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 29. Calm wind.

    High: 29 °C

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21. Calm wind.

    Low: 21 °C

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Calm wind becoming southeast 5 to 10 km/h in the afternoon.

    High: 31 °C

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Southeast wind 3 to 8 km/h.

    Low: 22 °C

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 31.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.

    Low: 22 °C

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33.

    High: 33 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 23.

    Low: 23 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 22. Calm wind.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after noon. Mostly cloudy, with a high near 29. Calm wind.
Sunday Night
Mostly cloudy, with a low around 21. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. Calm wind becoming southeast 5 to 10 km/h in the afternoon.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22. Southeast wind 3 to 8 km/h.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 31.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 33.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 23.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 32.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 21.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 30.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 21.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Brussels IL
 38.92°N 90.62°W (Elev. 502 m)
Last Update:
8:37 pm CDT Jul 12, 2025
Forecast Valid:
8pm CDT Jul 12, 2025-6pm CDT Jul 19, 2025
 
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