Matson Weather Forecast

    • 71
    • 100

    Isolated Thunderstorms

    • 64
    • 91

    Partly Sunny

    • 65
    • 89

    Mostly Sunny

    • 71
    • 95

    Mostly Sunny

    • 69
    • 98

    Chance Rain Showers

    • 64
    • 85

    Slight Chance Thunderstorms

    • 64
    • 86

    Partly Sunny

Today 5 Sep St. Charles

Sunny, hot. Near steady temperature in the upper 90s. Northwest Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 5 Sep St. Charles

Partly cloudy. Humid with Lows in the lower 70s. Northeast Winds around 5 Mph. Heat index Values up to 106 early in the evening.

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Matson Temperature Statistics

September Temperature

St. Louis, Spirit Of St. Louis Airport (8.1 miles)

  • Lowest 1 September, 2026

    71.7 °F

  • Average September

    86.4 °F

  • Highest 1 September, 2026

    99.6 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (8.1 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    68.9 °F
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