Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Light Rain
70°F
21°C
| Humidity | 97% |
| Wind Speed | Calm |
| Barometer | 29.98 in (1014.8 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Last update | 14 Oct 6:53 am CDT |
Extended Forecast for
Arnold MO
Today
High: 79 °F
Showers then
Showers
LikelyTonight
Low: 66 °F
Chance
T-stormsThursday
High: 85 °F
Showers
Likely and
Patchy FogThursday Night
Low: 49 °F
Showers
Friday
High: 61 °F
Mostly Sunny
Friday Night
Low: 39 °F
Mostly Clear
Saturday
High: 63 °F
Sunny
Saturday Night
Low: 38 °F
Clear
Sunday
High: 70 °F
Sunny
Detailed Forecast
Today
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 79. Light and variable wind becoming west around 5 mph in the afternoon. Chance of precipitation is 90%.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after midnight. Cloudy, then gradually becoming partly cloudy, with a low around 66. Light and variable wind.
Thursday
Showers likely and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog between 8am and 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 85. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. Southwest wind 7 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 61. Northwest wind around 17 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 63.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 78.
Additional Forecasts and Information
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Point Forecast:
Arnold MO
38.42°N 90.38°W (Elev. 495 ft)
38.42°N 90.38°W (Elev. 495 ft)
5:06 am CDT Oct 14, 2026
7am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
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