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Hazardous Weather Conditions
Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
44°F
7°C
| Humidity | 40% |
| Wind Speed | SW 12 mph |
| Barometer | 30.10 in (1019.3 mb) |
| Dewpoint | 21°F (-6°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 10 Jan 4:54 pm CST |
Extended Forecast for
Grafton IL
Tonight
Low: 26 °F
Chance
Rain/Snow
then Mostly
ClearSunday

High: 38 °F
Sunny
Sunday Night

Low: 28 °F
Clear
Monday

High: 50 °F
Sunny
Monday Night

Low: 36 °F
Partly Cloudy
Tuesday

High: 57 °F
Partly Sunny
Tuesday Night

Low: 37 °F
Mostly Cloudy
Wednesday

High: 42 °F
Mostly Cloudy
Wednesday Night

Low: 21 °F
Partly Cloudy
Detailed Forecast
Tonight
A chance of rain and snow showers before midnight, then a chance of flurries between midnight and 4am. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. West wind 8 to 17 mph becoming northwest after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 50%.
Sunday
Sunny, with a high near 38. Northwest wind 7 to 15 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 28. Southwest wind 5 to 7 mph.
Monday
Sunny, with a high near 50. West wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 36. Southwest wind 6 to 9 mph.
Tuesday
Partly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 42.
Friday Night
Mostly cloudy, with a low around 24.
Saturday
Partly sunny, with a high near 33.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Grafton IL
38.98°N 90.44°W (Elev. 515 ft)
38.98°N 90.44°W (Elev. 515 ft)
4:41 pm CST Jan 10, 2026
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026



