Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
66°F
19°C
| Humidity | 43% |
| Wind Speed | E 6 mph |
| Barometer | 30.33 in |
| Dewpoint | 43°F (6°C) |
| Visibility | 10.00 mi |
| Last update | 19 Oct 5:50 pm CDT |
Extended Forecast for
Glen Carbon IL
Tonight
Low: 45 °F
Partly Cloudy
Tuesday
High: 73 °F
Sunny
Tuesday Night
Low: 45 °F
Clear
Wednesday
High: 74 °F
Sunny
Wednesday Night
Low: 46 °F
Clear
Thursday
High: 75 °F
Sunny
Thursday Night
Low: 47 °F
Clear
Friday
High: 75 °F
Sunny
Friday Night
Low: 47 °F
Mostly Clear
Detailed Forecast
Tonight
Partly cloudy, with a low around 45. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 73. Light east wind.
Tuesday Night
Clear, with a low around 45. East wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 74. Calm wind.
Wednesday Night
Clear, with a low around 46. Calm wind.
Thursday
Sunny, with a high near 75.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 47.
Saturday
Sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 75.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Glen Carbon IL
38.74°N 89.94°W (Elev. 568 ft)
38.74°N 89.94°W (Elev. 568 ft)
2:36 pm CDT Oct 19, 2026
5pm CDT Oct 19, 2026-6pm CDT Oct 26, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
