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
73°F
23°C
| Humidity | 74% |
| Wind Speed | N 5 mph |
| Barometer | 30.15 in (1020.7 mb) |
| Dewpoint | 64°F (18°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 8:53 am CDT |
Extended Forecast for
Waterloo IL
Today
High: 85 °F
Sunny
Tonight
Low: 62 °F
Mostly Clear
Saturday
High: 86 °F
Mostly Sunny
Saturday Night
Low: 64 °F
Partly Cloudy
Sunday
High: 91 °F
Sunny
Sunday Night
Low: 70 °F
Mostly Clear
Monday
High: 94 °F
Sunny
Monday Night
Low: 73 °F
Mostly Clear
Tuesday
High: 95 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 85. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 62. Calm wind.
Saturday
Mostly sunny, with a high near 86. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 64. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 91. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
A 20 percent chance of showers. Sunny, with a high near 96.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Waterloo IL
38.33°N 90.16°W (Elev. 600 ft)
38.33°N 90.16°W (Elev. 600 ft)
6:21 am CDT Aug 28, 2026
9am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
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