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, Spirit Of St. Louis Airport (KSUS)
Lat: 38.66°NLon: 90.66°WElev: 463ft.
Fair
66°F
19°C
| Humidity | 87% |
| Wind Speed | W 3 mph |
| Barometer | 30.15 in (1020.4 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 7:54 am CDT |
Extended Forecast for
2 Miles NNE O'Fallon MO
Today
High: 86 °F
Sunny
Tonight
Low: 63 °F
Mostly Clear
Saturday
High: 88 °F
Mostly Sunny
Saturday Night
Low: 69 °F
Partly Cloudy
Sunday
High: 93 °F
Sunny
Sunday Night
Low: 74 °F
Mostly Clear
Monday
High: 96 °F
Sunny
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 96 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 86. Calm wind.
Tonight
Mostly clear, with a low around 63. Calm wind.
Saturday
Mostly sunny, with a high near 88. Calm wind becoming south around 5 mph in the morning.
Saturday Night
Partly cloudy, with a low around 69. South wind around 6 mph.
Sunday
Sunny, with a high near 93. South wind 6 to 8 mph.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 96.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
A 20 percent chance of showers. Sunny and hot, with a high near 97.
Additional Forecasts and Information
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Point Forecast:
2 Miles NNE O'Fallon MO
38.81°N 90.71°W (Elev. 502 ft)
38.81°N 90.71°W (Elev. 502 ft)
6:21 am CDT Aug 28, 2026
8am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
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