Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
67°F
19°C
| Humidity | 29% |
| Wind Speed | S 10 mph |
| Barometer | 30.16 in (1021.3 mb) |
| Dewpoint | 33°F (1°C) |
| Visibility | 10.00 mi |
| Last update | 13 Nov 1:53 pm CST |
Extended Forecast for
O'Fallon IL
This Afternoon
High: 66 °F
Sunny
Tonight
Low: 48 °F
Mostly Clear
Friday
High: 77 °F
Decreasing
CloudsFriday Night
Low: 58 °F
Partly Cloudy
Saturday
High: 77 °F
Mostly Sunny
Saturday Night
Low: 44 °F
Mostly Clear
Sunday
High: 60 °F
Sunny
Sunday Night
Low: 39 °F
Mostly Clear
Monday
High: 59 °F
Mostly Sunny
then Slight
Chance Rain
Detailed Forecast
This Afternoon
Sunny, with a high near 66. South wind around 8 mph.
Tonight
Mostly clear, with a low around 48. South wind around 7 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 77. Southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 58. South wind 7 to 10 mph.
Saturday
Mostly sunny, with a high near 77. South wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 39.
Monday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 59.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 47.
Tuesday
A 20 percent chance of rain. Mostly sunny, with a high near 60.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 57.
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 CST Nov 13, 2025
2pm CST Nov 13, 2025-6pm CST Nov 19, 2025
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