Downtown (St. Louis) Weather Forecast
- 77
- 93
Rain Showers Likely
- 77
- 97
Hot
- 78
- 98
Hot
- 78
- 98
Hot
- 77
- 98
Slight Chance Thunderstorms
- 77
- 96
Chance Thunderstorms
Today 21 Jul St. Louis City
Mostly cloudy with Showers likely with a chance of Thunderstorms in the Morning, then partly sunny with a slight chance of Showers and Thunderstorms in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Humid with Highs in the lower 90s. Northeast Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon. Chance of rain 70 percent. Heat index Values up to 104 in the afternoon.
Tonight 21 Jul St. Louis City
Partly cloudy with a slight chance of Showers and Thunderstorms. Humid with Lows in the mid 70s. East Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 103 early in the evening.
Downtown (St. Louis) Temperature Statistics
July Temperature
St. Louis Downtown Airport (4.3 miles)
Lowest 2 July, 2025
63.6 °FAverage July
81.3 °FHighest 11 July, 2025
97.6 °F
Climate (2020–Present)
St. Louis Downtown Airport (4.3 miles)
Average Low 2020–2025
47.3 °FAverage 2020–2025
57.7 °FAverage High 2020–2025
68.3 °F