Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
78°F
26°C
| Humidity | 30% |
| Wind Speed | S 5 mph |
| Barometer | 30.01 in (1016.0 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 10.00 mi |
| Heat Index | 78°F (26°C) |
| Last update | 6 Oct 2:53 pm CDT |
Extended Forecast for
3 Miles SW Mascoutah IL
Tonight
Low: 54 °F
Clear
Wednesday
High: 89 °F
Sunny
Wednesday Night
Low: 57 °F
Mostly Clear
Thursday
High: 83 °F
Sunny
Thursday Night
Low: 54 °F
Clear
Friday
High: 85 °F
Sunny
Friday Night
Low: 57 °F
Clear
Saturday
High: 89 °F
Sunny
Saturday Night
Low: 59 °F
Partly Cloudy
then Chance
Showers
Detailed Forecast
Tonight
Clear, with a low around 54. Light south wind.
Wednesday
Sunny, with a high near 89. West wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 57. Light north wind.
Thursday
Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 54. Light northeast wind.
Friday
Sunny, with a high near 85.
Friday Night
Clear, with a low around 57.
Saturday
Sunny, with a high near 89.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 59.
Sunday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 58.
Columbus Day
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 83.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles SW Mascoutah IL
38.48°N 89.84°W (Elev. 400 ft)
38.48°N 89.84°W (Elev. 400 ft)
2:51 pm CDT Oct 6, 2026
3pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
