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 Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
61°F
16°C
| Humidity | 94% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 30.14 in |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 6:50 am CDT |
Extended Forecast for
Glen Carbon IL
Today
High: 87 °F
Sunny
Tonight
Low: 63 °F
Mostly Clear
Saturday
High: 88 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Mostly Clear
Sunday
High: 93 °F
Sunny
Sunday Night
Low: 73 °F
Mostly Clear
Monday
High: 97 °F
Hot
Monday Night
Low: 76 °F
Mostly Clear
Tuesday
High: 98 °F
Hot
Detailed Forecast
Today
Sunny, with a high near 87. Calm wind becoming northeast around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 63. Light east wind.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming south 5 to 8 mph in the morning.
Saturday Night
Mostly cloudy during the early evening, then becoming mostly clear, with a low around 67. South wind around 7 mph.
Sunday
Sunny, with a high near 93. South wind 7 to 11 mph.
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 76.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 99.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Glen Carbon IL
38.77°N 89.97°W (Elev. 548 ft)
38.77°N 89.97°W (Elev. 548 ft)
6:21 am CDT Aug 28, 2026
7am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
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