St Peters Weather Forecast

    • 75
    • 95

    Slight Chance Thunderstorms

    • 72
    • 86

    Chance Thunderstorms

    • 74
    • 86

    Chance Thunderstorms

    • 76
    • 94

    Chance Thunderstorms

    • 76
    • 94

    Chance Thunderstorms

    • 77
    • 95

    Slight Chance Thunderstorms

    • 78
    • 98

    Hot

Today 16 Jul St. Charles

Mostly sunny with a slight chance of Showers and Thunderstorms. Near steady temperature in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent. Heat index Values up to 106.

Tonight 16 Jul St. Charles

Partly cloudy with a chance of Showers and Thunderstorms this Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Gusts up to 30 Mph this evening. Chance of rain 50 percent. Heat index Values up to 100 early this evening.

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St Peters Temperature Statistics

July Temperature

St. Louis, Spirit Of St. Louis Airport (8.7 miles)

  • Lowest 2 July, 2025

    62.1 °F

  • Average July

    79.5 °F

  • Highest 4 July, 2025

    93.7 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (8.7 miles)

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    56.8 °F

  • Average High 2020–2025

    68 °F
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