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
67°F
19°C
| Humidity | 87% |
| Wind Speed | Calm |
| Barometer | 30.04 in (1016.8 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 27 Aug 9:53 pm CDT |
Extended Forecast for
Mascoutah IL
Tonight
Low: 64 °F
Mostly Clear
Friday
High: 86 °F
Sunny
Friday Night
Low: 63 °F
Mostly Clear
Saturday
High: 88 °F
Sunny
Saturday Night
Low: 68 °F
Mostly Clear
Sunday
High: 93 °F
Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 95 °F
Sunny
Monday Night
Low: 75 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 64. Calm wind.
Friday
Sunny, with a high near 86. Light north wind.
Friday Night
Mostly clear, with a low around 63. Calm wind.
Saturday
Sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 68. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 72.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny, with a high near 96.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mascoutah IL
38.52°N 89.81°W (Elev. 423 ft)
38.52°N 89.81°W (Elev. 423 ft)
9:11 pm CDT Aug 27, 2026
10pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
Additional Resources
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