Mastodon State Park Weather Forecast

    • 39
    • 56

    Clearing Late

    • 34
    • 60

    Sunny

    • 37
    • 66

    Mostly Sunny

    • 40
    • 71

    Partly Sunny

    • 42
    • 74

    Mostly Sunny

    • 44
    • 76

    Mostly Sunny

    • 48
    • 80

    Mostly Sunny

Today 16 Oct Jefferson

Mostly sunny. Highs in the lower 80s.

Tonight 16 Oct Jefferson

Mostly cloudy with isolated Showers this Evening, then partly cloudy after midnight. Cooler with Lows in the upper 30s. North Winds 10 to 15 Mph. Gusts up to 30 Mph this evening. Chance of rain 20 percent.

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Mastodon State Park Temperature Statistics

October Temperature

St. Louis Downtown Airport (18.6 miles)

  • Lowest 6 October, 2026

    42.7 °F

  • Average October

    68.8 °F

  • Highest 13 October, 2026

    93.9 °F

Climate (2021–2026)

St. Louis Downtown Airport (18.6 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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