Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
45°F
7°C
| Humidity | 97% |
| Wind Speed | Calm |
| Barometer | 30.28 in (1025.3 mb) |
| Dewpoint | 44°F (7°C) |
| Visibility | 10.00 mi |
| Last update | 8 Sep 1:53 am CDT |
Extended Forecast for
O'Fallon IL
Overnight
Low: 47 °F
Clear
Monday
High: 78 °F
Sunny
Monday Night
Low: 49 °F
Mostly Clear
Tuesday
High: 82 °F
Sunny
Tuesday Night
Low: 57 °F
Mostly Clear
Wednesday
High: 90 °F
Sunny
Wednesday Night
Low: 62 °F
Mostly Clear
Thursday
High: 92 °F
Sunny
Thursday Night
Low: 64 °F
Mostly Clear
Detailed Forecast
Overnight
Clear, with a low around 47. Calm wind.
Monday
Sunny, with a high near 78. East wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 49. East wind around 6 mph.
Tuesday
Sunny, with a high near 82. Calm wind becoming south around 6 mph in the morning.
Tuesday Night
Mostly clear, with a low around 57. Light southeast wind.
Wednesday
Sunny, with a high near 90.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 64.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 94.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
O'Fallon IL
38.59°N 89.95°W (Elev. 545 ft)
38.59°N 89.95°W (Elev. 545 ft)
2:26 am CDT Sep 8, 2025
2am CDT Sep 8, 2025-6pm CDT Sep 14, 2025
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