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Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
A Few Clouds
79°F
26°C
| Humidity | 49% |
| Wind Speed | NA |
| Barometer | 30.14 in (1020.4 mb) |
| Dewpoint | 58°F (14°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 23 Jun 5:54 pm CDT |
Extended Forecast for
4 Miles W Jerseyville IL
Tonight
Low: 60 °F
Partly Cloudy
Wednesday
High: 81 °F
Chance
T-stormsWednesday Night
Low: 63 °F
Slight Chance
T-stormsThursday
High: 83 °F
Chance
T-storms then
T-storms
LikelyThursday Night
Low: 64 °F
T-storms
Friday
High: 81 °F
T-storms
Friday Night
Low: 66 °F
Showers
LikelySaturday
High: 87 °F
Slight Chance
T-stormsSaturday Night
Low: 70 °F
Slight Chance
T-storms
Detailed Forecast
Tonight
Partly cloudy, with a low around 60. Light and variable wind becoming east around 5 mph after midnight.
Wednesday
A slight chance of showers and thunderstorms before noon, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81. South wind 5 to 7 mph becoming southwest in the afternoon. Chance of precipitation is 30%.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 83. Light south wind. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms. Low around 64. Southeast wind 3 to 5 mph. Chance of precipitation is 80%.
Friday
Showers and thunderstorms. High near 81. Chance of precipitation is 80%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 94.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles W Jerseyville IL
39.11°N 90.41°W (Elev. 617 ft)
39.11°N 90.41°W (Elev. 617 ft)
9:46 am CDT Jun 23, 2026
6pm CDT Jun 23, 2026-6pm CDT Jun 30, 2026
Additional Resources
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