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Hazardous Weather Conditions
Current conditions at
St. Louis, Spirit Of St. Louis Airport (KSUS)
Lat: 38.66°NLon: 90.66°WElev: 463ft.
Fog/Mist
79°F
26°C
| Humidity | 88% |
| Wind Speed | Calm |
| Barometer | 29.90 in (1011.6 mb) |
| Dewpoint | 75°F (24°C) |
| Visibility | 4.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 27 Jun 9:54 am CDT |
Extended Forecast for
O'Fallon MO
Extreme Heat Watch June 28, 12:00pm until July 3, 12:00am
Today
High: 85 °F
Chance
T-stormsTonight
Low: 72 °F
Chance
T-stormsSunday
High: 94 °F
Sunny
Sunday Night
Low: 74 °F
Mostly Clear
Monday
High: 95 °F
Sunny
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 97 °F
Hot
Tuesday Night
Low: 76 °F
Clear
Wednesday
High: 96 °F
Sunny
Detailed Forecast
Today
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Calm wind.
Tonight
A 40 percent chance of showers and thunderstorms, mainly between 10pm and 5am. Increasing clouds, with a low around 72. Calm wind becoming south around 5 mph after midnight.
Sunday
Sunny, with a high near 94. Heat index values as high as 109. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 74. South wind 5 to 8 mph.
Monday
Sunny, with a high near 95. South wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Clear, with a low around 76.
Wednesday
Sunny, with a high near 96.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny, with a high near 94.
Additional Forecasts and Information
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Point Forecast:
O'Fallon MO
38.79°N 90.71°W (Elev. 535 ft)
38.79°N 90.71°W (Elev. 535 ft)
9:26 am CDT Jun 27, 2026
10am CDT Jun 27, 2026-6pm CDT Jul 3, 2026
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