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Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
85°F
29°C
| Humidity | 65% |
| Wind Speed | SE 5 mph |
| Barometer | 29.92 in (1012.5 mb) |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 91°F (33°C) |
| Last update | 8 Jul 7:54 pm CDT |
Extended Forecast for
4 Miles NW Grafton IL
Tonight
Low: 72 °F
Mostly Clear
Thursday
High: 91 °F
Mostly Sunny
then Chance
T-stormsThursday Night
Low: 73 °F
Chance
T-stormsFriday
High: 87 °F
Chance
Showers then
T-storms
LikelyFriday Night
Low: 71 °F
T-storms
LikelySaturday
High: 86 °F
Chance
Showers then
Chance
T-stormsSaturday Night
Low: 69 °F
Slight Chance
T-stormsSunday
High: 86 °F
Slight Chance
ShowersSunday Night
Low: 68 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 72. Calm wind becoming south around 5 mph after midnight.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. Southwest wind around 6 mph. Chance of precipitation is 50%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 4am. Mostly cloudy, with a low around 73. Northwest wind around 5 mph becoming light and variable.
Friday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 87. West wind around 5 mph becoming south in the morning. Chance of precipitation is 70%.
Friday Night
Showers and thunderstorms likely before 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 71. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 20%.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 68.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Clear, with a low around 72.
Wednesday
Sunny, with a high near 91.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles NW Grafton IL
39.02°N 90.47°W (Elev. 699 ft)
39.02°N 90.47°W (Elev. 699 ft)
6:01 pm CDT Jul 8, 2026
8pm CDT Jul 8, 2026-6pm CDT Jul 15, 2026
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