Foristell Weather Forecast

    • 68
    • 87

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 62
    • 82

    Partly Sunny

    • 65
    • 80

    Mostly Cloudy

    • 68
    • 85

    Partly Sunny

    • 66
    • 86

    Mostly Sunny

    • 67
    • 87

    Partly Sunny

Today 21 Aug St. Charles

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

Tonight 21 Aug St. Charles

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

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Foristell Temperature Statistics

August Temperature

Washington Regional Airport (15.5 miles)

  • Lowest 3 August, 2026

    62.6 °F

  • Average August

    78.8 °F

  • Highest 13 August, 2026

    96.8 °F

Climate (2021–2026)

Washington Regional Airport (15.5 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.6 °F
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