Mount Pleasant Weather Forecast

    • 71
    • 89

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 64
    • 83

    Partly Sunny

    • 67
    • 82

    Mostly Cloudy

    • 69
    • 86

    Partly Sunny

    • 69
    • 88

    Mostly Sunny

    • 69
    • 89

    Mostly Sunny

Today 21 Aug St. Louis City

Sunny. Near steady temperature in the mid 80s. West Winds around 5 Mph.

Tonight 21 Aug St. Louis City

Mostly clear. Lows in the upper 60s. Southwest Winds around 5 Mph.

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Mount Pleasant Temperature Statistics

August Temperature

St. Louis Downtown Airport (4.3 miles)

  • Lowest 3 August, 2026

    63.6 °F

  • Average August

    79.8 °F

  • Highest 11 August, 2026

    96.7 °F

Climate (2021–2026)

St. Louis Downtown Airport (4.3 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.3 °F
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