Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Light Rain
51°F
11°C
| Humidity | 100% |
| Wind Speed | S 6 mph |
| Barometer | 29.81 in (1009.3 mb) |
| Dewpoint | 51°F (11°C) |
| Visibility | 7.00 mi |
| Wind Chill | 49°F (9°C) |
| Last update | 25 Nov 1:53 am CST |
Extended Forecast for
O'Fallon IL
Overnight
Low: 51 °F
Scattered
Showers and
Patchy FogTuesday
High: 58 °F
Isolated
Showers and
Patchy Fog
then CloudyTuesday Night
Low: 36 °F
Slight Chance
Rain then
Partly Cloudy
and BreezyWednesday
High: 46 °F
Mostly Sunny
and Breezy
then SunnyWednesday Night
Low: 28 °F
Partly Cloudy
Thanksgiving Day
High: 41 °F
Sunny
Thursday Night
Low: 22 °F
Mostly Clear
Friday
High: 40 °F
Mostly Sunny
Friday Night
Low: 32 °F
Chance Snow
then
Rain/Snow
Likely
Detailed Forecast
Overnight
Scattered showers, mainly before 4am. Patchy fog. Otherwise, cloudy, with a low around 51. South wind around 6 mph. Chance of precipitation is 50%.
Tuesday
Isolated showers before 7am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 58. Light southwest wind becoming west 5 to 9 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
A slight chance of rain between 7pm and 8pm. Mostly cloudy, with a low around 36. Breezy, with a west wind 8 to 13 mph increasing to 15 to 20 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 46. Breezy, with a west wind 13 to 21 mph, with gusts as high as 34 mph.
Wednesday Night
Partly cloudy, with a low around 28. West wind 7 to 10 mph.
Thanksgiving Day
Sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 22.
Friday
Mostly sunny, with a high near 40.
Friday Night
A chance of snow before midnight, then snow likely, possibly mixed with rain. Cloudy, with a low around 32. Chance of precipitation is 60%.
Saturday
Rain and snow likely, becoming all rain after noon. Cloudy, with a high near 41. Chance of precipitation is 70%.
Saturday Night
Rain likely. Cloudy, with a low around 33. Chance of precipitation is 60%.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 44.
Sunday Night
A 50 percent chance of rain. Cloudy, with a low around 33.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 45.
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)
12:31 am CST Nov 25, 2025
2am CST Nov 25, 2025-6pm CST Dec 1, 2025
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