Wentzville Weather Forecast

    • 54
    • 76

    Sunny

    • 63
    • 82

    Mostly Sunny

    • 69
    • 87

    Rain Showers Likely

    • 62
    • 79

    Rain Showers

    • 57
    • 69

    Chance Rain Showers

    • 58
    • 71

    Chance Rain Showers

Today 28 Sep St. Charles

Sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 28 Sep St. Charles

Clear. Lows in the lower 50s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Wentzville Temperature Statistics

September Temperature

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

  • Lowest 25 September, 2026

    53.7 °F

  • Average September

    78 °F

  • Highest 5 September, 2026

    102.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    69 °F
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