Wentzville Weather Forecast

    • 65
    • 86

    Partly Sunny

    • 66
    • 87

    Mostly Sunny

    • 71
    • 91

    Mostly Sunny

    • 73
    • 93

    Rain Showers Likely

    • 70
    • 89

    Chance Thunderstorms

    • 68
    • 89

    Partly Sunny

Today 6 Jul St. Charles

Mostly sunny. Patchy fog in the morning. A slight chance of Showers and Thunderstorms in the afternoon. Highs in the mid 80s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 6 Jul St. Charles

Partly cloudy. Lows in the mid 60s. North Winds 5 to 10 Mph.

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Wentzville Temperature Statistics

July Temperature

St. Louis, Spirit Of St. Louis Airport (14.9 miles)

  • Lowest 3 July, 2026

    73.9 °F

  • Average July

    85.1 °F

  • Highest 2 July, 2026

    96.7 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (14.9 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.9 °F
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