Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
A Few Clouds
82°F
28°C
| Humidity | 58% |
| Wind Speed | NW 8 mph |
| Barometer | 29.99 in (1015.4 mb) |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Heat Index | 84°F (29°C) |
| Last update | 23 Aug 2:53 pm CDT |
Extended Forecast for
O'Fallon IL
Tonight
Low: 59 °F
Gradual
ClearingSunday
High: 79 °F
Sunny
Sunday Night
Low: 55 °F
Mostly Clear
Monday
High: 77 °F
Mostly Sunny
Monday Night
Low: 52 °F
Partly Cloudy
Tuesday
High: 77 °F
Sunny
Tuesday Night
Low: 51 °F
Mostly Clear
Wednesday
High: 79 °F
Sunny
Wednesday Night
Low: 55 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 59. North wind 5 to 7 mph.
Sunday
Sunny, with a high near 79. Northwest wind 5 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 55. Northwest wind 5 to 9 mph becoming light north after midnight.
Monday
Mostly sunny, with a high near 77. Calm wind becoming northwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 52. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 59.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 81.
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)
2:31 pm CDT Aug 23, 2025
3pm CDT Aug 23, 2025-6pm CDT Aug 30, 2025
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