Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Mostly Cloudy
55°F
13°C
| Humidity | 77% |
| Wind Speed | SW 5 mph |
| Barometer | 29.84 in (1010.3 mb) |
| Dewpoint | 48°F (9°C) |
| Visibility | 10.00 mi |
| Wind Chill | 54°F (12°C) |
| Last update | 4 Nov 8:54 pm CST |
Extended Forecast for
Jerseyville IL
Tonight
Low: 45 °F
Decreasing
CloudsThursday
High: 60 °F
Increasing
CloudsThursday Night
Low: 43 °F
Slight Chance
Rain then
Mostly CloudyFriday
High: 53 °F
Decreasing
CloudsFriday Night
Low: 31 °F
Partly Cloudy
Saturday
High: 53 °F
Sunny
Saturday Night
Low: 31 °F
Mostly Clear
Sunday
High: 59 °F
Sunny
Sunday Night
Low: 34 °F
Clear
Detailed Forecast
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. Southwest wind around 8 mph.
Thursday
Increasing clouds, with a high near 60. Southwest wind 9 to 14 mph.
Thursday Night
A slight chance of rain between 9pm and 10pm. Mostly cloudy, with a low around 43. Northwest wind 5 to 9 mph. Chance of precipitation is 20%.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 53. North wind 8 to 13 mph.
Friday Night
Partly cloudy, with a low around 31. North wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 31.
Sunday
Sunny, with a high near 59.
Sunday Night
Clear, with a low around 34.
Monday
Sunny, with a high near 64.
Monday Night
Clear, with a low around 38.
Tuesday
Sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 40.
Veterans Day
Sunny, with a high near 65.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Jerseyville IL
39.11°N 90.32°W (Elev. 630 ft)
39.11°N 90.32°W (Elev. 630 ft)
6:21 pm CST Nov 4, 2026
9pm CST Nov 4, 2026-6pm CST Nov 11, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
