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
64°F
18°C
| Humidity | 93% |
| Wind Speed | Calm |
| Barometer | 30.12 in (1019.8 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 29 Aug 12:53 am CDT |
Extended Forecast for
Waterloo IL
Overnight
Low: 62 °F
Mostly Clear
Saturday
High: 88 °F
Mostly Sunny
Saturday Night
Low: 66 °F
Partly Cloudy
Sunday
High: 92 °F
Sunny
Sunday Night
Low: 71 °F
Mostly Clear
Monday
High: 95 °F
Sunny
Monday Night
Low: 74 °F
Mostly Clear
Tuesday
High: 96 °F
Sunny
Tuesday Night
Low: 75 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 62. Calm wind.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming southeast around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 66. South wind 3 to 5 mph.
Sunday
Sunny, with a high near 92. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 71. South wind 5 to 7 mph.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 95.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny, with a high near 95.
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)
12:25 am CDT Aug 29, 2026
1am CDT Aug 29, 2026-6pm CDT Sep 4, 2026
Additional Resources
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