Dangerous Heat and Possible Flooding
Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
73°F
23°C
| Humidity | 66% |
| Wind Speed | N 3 mph |
| Barometer | 30.02 in (1016.1 mb) |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 27 Aug 8:53 pm CDT |
Extended Forecast for
Swansea IL
Tonight
Low: 64 °F
Clear
Friday
High: 87 °F
Sunny
Friday Night
Low: 63 °F
Mostly Clear
Saturday
High: 89 °F
Sunny
Saturday Night
Low: 68 °F
Mostly Clear
Sunday
High: 95 °F
Sunny
Sunday Night
Low: 73 °F
Mostly Clear
Monday
High: 97 °F
Hot
Monday Night
Low: 77 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 64. North wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 63. Light northeast wind.
Saturday
Sunny, with a high near 89. Calm wind becoming south 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 68. South wind around 6 mph.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 77.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 78.
Thursday
Sunny and hot, with a high near 98.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Swansea IL
38.55°N 89.98°W (Elev. 551 ft)
38.55°N 89.98°W (Elev. 551 ft)
7:56 pm CDT Aug 27, 2026
9pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
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