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.

Overcast

49°F

9°C

Humidity 61%
Wind Speed NW 9 mph
Barometer 30.10 in (1019.2 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 1 Nov 3:54 pm CDT
Extended Forecast for

5 Miles WNW Grafton IL

Freeze Warning November 2, 01:00am until November 2, 07:00am
Click here for hazard details and duration
Freeze Warning

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Mostly cloudy, with a high near 50. Northwest wind around 9 mph.

    High: 50 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 8pm. Widespread frost, mainly after 5am. Otherwise, partly cloudy, with a low around 34. Northwest wind 3 to 6 mph.

    Low: 34 °F

    Slight Chance
    Rain then
    Frost

  • Sunday

    Sunday: Widespread frost before 9am. Otherwise, sunny, with a high near 53. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 53 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. South wind around 6 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Southwest wind 6 to 8 mph becoming west in the afternoon.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Mostly cloudy, with a high near 50. Northwest wind around 9 mph.
Tonight
A 20 percent chance of rain before 8pm. Widespread frost, mainly after 5am. Otherwise, partly cloudy, with a low around 34. Northwest wind 3 to 6 mph.
Sunday
Widespread frost before 9am. Otherwise, sunny, with a high near 53. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Clear, with a low around 39. South wind around 6 mph.
Monday
Sunny, with a high near 63. Southwest wind 6 to 8 mph becoming west in the afternoon.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 69.
Wednesday Night
Clear, with a low around 43.
Thursday
Sunny, with a high near 66.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 53.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 65.
Friday Night
A 20 percent chance of rain. Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Grafton IL
 39°N 90.5°W (Elev. 801 ft)
Last Update:
1:56 pm CDT Nov 1, 2025
Forecast Valid:
4pm CDT Nov 1, 2025-6pm CST Nov 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation