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
62°F
17°C
| Humidity | 96% |
| Wind Speed | Calm |
| Barometer | 30.12 in (1019.6 mb) |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 29 Aug 3:53 am CDT |
Extended Forecast for
Granite City IL
Today
High: 91 °F
Mostly Sunny
Tonight
Low: 70 °F
Partly Cloudy
Sunday
High: 96 °F
Mostly Sunny
Sunday Night
Low: 75 °F
Mostly Clear
Monday
High: 99 °F
Hot
Monday Night
Low: 79 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 80 °F
Mostly Clear
Wednesday
High: 101 °F
Hot
Detailed Forecast
Today
Mostly sunny, with a high near 91. Calm wind becoming south 5 to 8 mph in the morning.
Tonight
Partly cloudy, with a low around 70. South wind around 7 mph.
Sunday
Mostly sunny, with a high near 96. South wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 75. South wind around 8 mph.
Monday
Sunny and hot, with a high near 99. South wind 7 to 9 mph.
Monday Night
Mostly clear, with a low around 79.
Tuesday
Sunny and hot, with a high near 101.
Tuesday Night
Mostly clear, with a low around 80.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Mostly clear, with a low around 81.
Thursday
Mostly sunny and hot, with a high near 100.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Friday
A 20 percent chance of showers. Mostly sunny and hot, with a high near 98.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Granite City IL
38.73°N 90.11°W (Elev. 417 ft)
38.73°N 90.11°W (Elev. 417 ft)
3:26 am CDT Aug 29, 2026
4am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
Additional Resources
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