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
85°F
29°C
| Humidity | 43% |
| Wind Speed | Calm |
| Barometer | 30.08 in (1018.2 mb) |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Heat Index | 85°F (29°C) |
| Last update | 28 Aug 5:53 pm CDT |
Extended Forecast for
Madison ILSimilar City Names
Tonight
Low: 63 °F
Mostly Clear
Saturday
High: 91 °F
Mostly Sunny
Saturday Night
Low: 71 °F
Mostly Clear
Sunday
High: 97 °F
Hot
Sunday Night
Low: 76 °F
Mostly Clear
Monday
High: 100 °F
Hot
Monday Night
Low: 79 °F
Mostly Clear
Tuesday
High: 101 °F
Hot
Tuesday Night
Low: 80 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 91. Calm wind becoming southeast 5 to 8 mph in the morning.
Saturday Night
Mostly clear, with a low around 71. South wind around 7 mph.
Sunday
Sunny and hot, with a high near 97. South wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 7 to 9 mph.
Monday
Sunny and hot, with a high near 100.
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 100.
Wednesday Night
Mostly clear, with a low around 80.
Thursday
Mostly sunny and hot, with a high near 100.
Thursday Night
Partly cloudy, with a low around 80.
Friday
Mostly sunny and hot, with a high near 99.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Madison ILSimilar City Names
38.68°N 90.14°W (Elev. 407 ft)
38.68°N 90.14°W (Elev. 407 ft)
5:26 pm CDT Aug 28, 2026
6pm CDT Aug 28, 2026-6pm CDT Sep 4, 2026
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