Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
88°F
31°C
| Humidity | 31% |
| Wind Speed | SE 6 mph |
| Barometer | 30.13 in (1019.9 mb) |
| Dewpoint | 54°F (12°C) |
| Visibility | 10.00 mi |
| Heat Index | 86°F (30°C) |
| Last update | 28 Sep 1:53 pm CDT |
Extended Forecast for
O'Fallon IL
This Afternoon
High: 88 °F
Sunny
Tonight
Low: 60 °F
Clear
Monday
High: 89 °F
Sunny
Monday Night
Low: 59 °F
Clear
Tuesday
High: 89 °F
Sunny
Tuesday Night
Low: 60 °F
Mostly Cloudy
Wednesday
High: 86 °F
Partly Sunny
Wednesday Night
Low: 60 °F
Mostly Cloudy
Thursday
High: 86 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 88. Southeast wind around 6 mph.
Tonight
Clear, with a low around 60. Light and variable wind.
Monday
Sunny, with a high near 89. Calm wind becoming east 5 to 7 mph in the afternoon.
Monday Night
Clear, with a low around 59. Light northeast wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 86.
Wednesday Night
Mostly cloudy, with a low around 60.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 86.
Friday Night
Clear, with a low around 58.
Saturday
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)
1:36 pm CDT Sep 28, 2025
2pm CDT Sep 28, 2025-6pm CDT Oct 4, 2025
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