Herculaneum Weather Forecast

    • 53
    • 81

    Sunny

    • 57
    • 89

    Mostly Sunny

    • 52
    • 83

    Mostly Sunny

    • 54
    • 84

    Sunny

    • 58
    • 87

    Partly Sunny

    • 59
    • 84

    Partly Sunny

Today 6 Oct Jefferson

Sunny. Highs around 80. South Winds around 5 Mph.

Tonight 6 Oct Jefferson

Mostly clear. Not as cool with Lows in the mid 50s. South Winds around 5 Mph.

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Herculaneum Temperature Statistics

October Temperature

St. Louis Downtown Airport (23.6 miles)

  • Lowest 4 October, 2026

    46 °F

  • Average October

    67.1 °F

  • Highest 1 October, 2026

    92.6 °F

Climate (2021–2026)

St. Louis Downtown Airport (23.6 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.5 °F
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