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
69°F
21°C
| Humidity | 84% |
| Wind Speed | Calm |
| Barometer | 30.10 in (1019.0 mb) |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 8:53 pm CDT |
Extended Forecast for
Valmeyer IL
Tonight
Low: 61 °F
Mostly Clear
then Patchy
FogSaturday
High: 90 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Mostly Clear
Sunday
High: 95 °F
Sunny
Sunday Night
Low: 73 °F
Mostly Clear
Monday
High: 97 °F
Hot
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Tuesday Night
Low: 77 °F
Mostly Clear
Detailed Forecast
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 61. Calm wind.
Saturday
Mostly sunny, with a high near 90. Calm wind becoming southeast around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 67. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 95. South wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 73. South wind around 7 mph.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 75.
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 97.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 98.
Thursday Night
Mostly clear, with a low around 77.
Friday
Sunny and hot, with a high near 97.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Valmeyer IL
38.31°N 90.3°W (Elev. 397 ft)
38.31°N 90.3°W (Elev. 397 ft)
5:26 pm CDT Aug 28, 2026
9pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
Additional Resources
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