News Headlines
Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Overcast
79°F
26°C
| Humidity | 77% |
| Wind Speed | N 10 mph |
| Barometer | 29.99 in (1015.2 mb) |
| Dewpoint | 71°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 82°F (28°C) |
| Last update | 11 Jul 12:54 pm CDT |
Extended Forecast for
Grafton IL
This Afternoon
High: 83 °F
T-storms
Tonight
Low: 67 °F
Mostly Clear
Sunday
High: 86 °F
Sunny
Sunday Night
Low: 66 °F
Clear
Monday
High: 87 °F
Sunny
Monday Night
Low: 68 °F
Clear
Tuesday
High: 90 °F
Sunny
Tuesday Night
Low: 71 °F
Mostly Clear
Wednesday
High: 90 °F
Sunny
Detailed Forecast
This Afternoon
Showers and thunderstorms, mainly before 4pm. High near 83. North wind 7 to 10 mph. Chance of precipitation is 80%.
Tonight
Mostly clear, with a low around 67. North wind 6 to 9 mph.
Sunday
Sunny, with a high near 86. North wind 8 to 11 mph.
Sunday Night
Clear, with a low around 66. Northeast wind 5 to 9 mph becoming light north.
Monday
Sunny, with a high near 87. Northeast wind 5 to 9 mph.
Monday Night
Clear, with a low around 68.
Tuesday
Sunny, with a high near 90.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 72.
Friday
Sunny, with a high near 92.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grafton IL
38.98°N 90.44°W (Elev. 515 ft)
38.98°N 90.44°W (Elev. 515 ft)
11:51 am CDT Jul 11, 2026
1pm CDT Jul 11, 2026-6pm CDT Jul 17, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
