Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
81°F
27°C
| Humidity | 35% |
| Wind Speed | N 10 G 17 mph |
| Barometer | 30.16 in (1021.1 mb) |
| Dewpoint | 51°F (11°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 4 Oct 2:53 pm CDT |
Extended Forecast for
O'Fallon IL
Tonight
Low: 52 °F
Clear
Monday
High: 77 °F
Sunny
Monday Night
Low: 47 °F
Clear
Tuesday
High: 80 °F
Sunny
Tuesday Night
Low: 56 °F
Clear
Wednesday
High: 86 °F
Sunny
Wednesday Night
Low: 57 °F
Clear
Thursday
High: 84 °F
Sunny
Thursday Night
Low: 57 °F
Clear
Detailed Forecast
Tonight
Clear, with a low around 52. North wind 5 to 7 mph.
Monday
Sunny, with a high near 77. Northeast wind 5 to 7 mph.
Monday Night
Clear, with a low around 47. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 80. Calm wind becoming south around 6 mph in the morning.
Tuesday Night
Clear, with a low around 56. South wind 3 to 5 mph.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Clear, with a low around 57.
Thursday
Sunny, with a high near 84.
Thursday Night
Clear, with a low around 57.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 58.
Saturday
Sunny, with a high near 84.
Saturday Night
A 20 percent chance of showers. Partly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers. Mostly sunny, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
O'Fallon IL
38.59°N 89.92°W (Elev. 551 ft)
38.59°N 89.92°W (Elev. 551 ft)
1:26 pm CDT Oct 4, 2026
3pm CDT Oct 4, 2026-6pm CDT Oct 11, 2026
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