Foristell Weather Forecast

    • 60
    • 75

    Mostly Sunny

    • 49
    • 69

    Chance Rain Showers

    • 49
    • 74

    Mostly Sunny

    • 46
    • 73

    Mostly Sunny

    • 53
    • 77

    Mostly Cloudy

    • 58
    • 81

    Partly Sunny

Today 4 Sep St. Charles

Mostly sunny. Cooler with Highs in the mid 70s. North Winds around 5 Mph, becoming west this afternoon.

Tonight 4 Sep St. Charles

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 60s. South Winds around 5 Mph.

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  • Temperature Real-Time

Foristell Temperature Statistics

September Temperature

Washington Regional Airport (15.5 miles)

  • Lowest 1 September, 2025

    59 °F

  • Average September

    69.8 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Washington Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.9 °F

  • Average High 2020–2025

    68.7 °F
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