Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
15°F
-9°C
| Humidity | 61% |
| Wind Speed | NW 12 mph |
| Barometer | 30.24 in (1024.6 mb) |
| Dewpoint | 4°F (-16°C) |
| Visibility | 10.00 mi |
| Wind Chill | 1°F (-17°C) |
| Last update | 17 Mar 6:54 am CDT |
Extended Forecast for
3 Miles SW Jerseyville IL
Today

High: 32 °F
Increasing
CloudsTonight
Low: 28 °F
Chance Snow
then Chance
Rain/SnowWednesday

High: 62 °F
Becoming
SunnyWednesday Night

Low: 41 °F
Mostly Cloudy
Thursday

High: 72 °F
Mostly Sunny
Thursday Night

Low: 45 °F
Partly Cloudy
Friday

High: 75 °F
Sunny
Friday Night

Low: 48 °F
Partly Cloudy
Saturday

High: 77 °F
Sunny
Detailed Forecast
Today
Increasing clouds, with a high near 32. Northwest wind 6 to 11 mph becoming south in the afternoon.
Tonight
A chance of snow before 3am, then a chance of rain. Cloudy, with a low around 28. Southeast wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 62. South wind 9 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 41. West wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 72. South wind 6 to 8 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 48.
Saturday
Sunny, with a high near 77.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Partly sunny, with a high near 55.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles SW Jerseyville IL
39.09°N 90.38°W (Elev. 607 ft)
39.09°N 90.38°W (Elev. 607 ft)
3:31 am CDT Mar 17, 2026
6am CDT Mar 17, 2026-6pm CDT Mar 23, 2026


