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.

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Downtown (St. Louis) Temperature Statistics

July Temperature

St. Louis Downtown Airport (4.3 miles)

  • Lowest 2 July, 2025

    63.6 °F
  • Average July

    81.3 °F
  • Highest 11 July, 2025

    97.6 °F

Climate (2020–Present)

St. Louis Downtown Airport (4.3 miles)

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  • Average Low 2020–2025

    47.3 °F
  • Average 2020–2025

    57.7 °F
  • Average High 2020–2025

    68.3 °F
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