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Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
31°F
-1°C
| Humidity | 45% |
| Wind Speed | W 5 mph |
| Barometer | 30.08 in (1018.9 mb) |
| Dewpoint | 12°F (-11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 26°F (-3°C) |
| Last update | 21 Jan 5:54 pm CST |
Extended Forecast for
3 Miles SSW Dow IL
Tonight

Low: 23 °F
Partly Cloudy
Thursday

High: 37 °F
Partly Sunny
Thursday Night

Low: 8 °F
Mostly Cloudy
Friday

High: 12 °F
Cold
Friday Night
Low: 2 °F
Mostly Cloudy
then Chance
SnowSaturday

High: 13 °F
Snow Likely
Saturday Night

Low: 8 °F
Snow
Sunday

High: 19 °F
Chance Snow
Sunday Night

Low: -2 °F
Partly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 23. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.
Thursday
Partly sunny, with a high near 37. West wind 3 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 8. Light and variable wind becoming north 13 to 18 mph in the evening. Winds could gust as high as 25 mph.
Friday
Mostly cloudy and cold, with a high near 12. Wind chill values as low as -10. North wind 13 to 18 mph, with gusts as high as 25 mph.
Friday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 2. Northeast wind 11 to 13 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 13. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Saturday Night
Snow. Low around 8. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow, mainly before noon. Partly sunny and cold, with a high near 19.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny and cold, with a high near 16.
Monday Night
Mostly clear, with a low around 3.
Tuesday
Mostly sunny, with a high near 28.
Tuesday Night
Partly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 25.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles SSW Dow IL
39°N 90.33°W (Elev. 597 ft)
39°N 90.33°W (Elev. 597 ft)
4:51 pm CST Jan 21, 2026
6pm CST Jan 21, 2026-6pm CST Jan 28, 2026


