St. Louis Weather Forecast

    • 72
    • 99

    Slight Chance Thunderstorms

    • 70
    • 95

    Partly Sunny

    • 70
    • 94

    Partly Sunny

    • 69
    • 94

    Slight Chance Thunderstorms

    • 67
    • 89

    Chance Rain Showers

    • 64
    • 88

    Chance Rain Showers

Today 14 Sep St. Louis City

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 90s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 14 Sep St. Louis City

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows around 70. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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St. Louis Temperature Statistics

September Temperature

St. Louis Downtown Airport (5 miles)

  • Lowest 8 September, 2025

    44.1 °F

  • Average September

    68 °F

  • Highest 11 September, 2025

    89.1 °F

Climate (2020–Present)

St. Louis Downtown Airport (5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    68.4 °F
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