Hazardous Weather Conditions
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
82°F
28°C
| Humidity | 82% |
| Wind Speed | Calm |
| Barometer | 29.98 in (1014.8 mb) |
| Dewpoint | 76°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 89°F (32°C) |
| Last update | 17 Aug 8:53 pm CDT |
Extended Forecast for
3 Miles WNW Swansea IL
Heat Advisory August 17, 09:15pm until August 18, 08:00pm
NOW until 8:00pm Mon
Heat Advisory
Tonight
Low: 76 °F
Partly Cloudy
Monday
High: 97 °F
Mostly Sunny
then Chance
ShowersMonday Night
Low: 75 °F
Chance
Showers then
Slight Chance
T-stormsTuesday
High: 93 °F
Chance
Showers then
Chance
T-stormsTuesday Night
Low: 73 °F
Chance
T-storms then
Chance
ShowersWednesday
High: 87 °F
Slight Chance
T-stormsWednesday Night
Low: 67 °F
Partly Cloudy
Thursday
High: 86 °F
Mostly Sunny
Detailed Forecast
Tonight
Partly cloudy, with a low around 76. Light southeast wind.
Monday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 107. Southeast wind 3 to 6 mph.
Monday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 103. Calm wind becoming west around 6 mph in the morning.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. North wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Wednesday
A slight chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 87. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 67.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 67.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 68.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 82.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles WNW Swansea IL
38.57°N 90.04°W (Elev. 486 ft)
38.57°N 90.04°W (Elev. 486 ft)
8:56 pm CDT Aug 17, 2025
9pm CDT Aug 17, 2025-6pm CDT Aug 24, 2025
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