Mastodon State Park Weather Forecast

    • 30
    • 37

    Slight Chance Snow

    • 20
    • 46

    Rain/Snow

    • 10
    • 27

    Partly Sunny

    • 14
    • 29

    Partly Sunny

    • 10
    • 28

    Mostly Sunny

    • 20
    • 34

    Mostly Sunny

Today 15 Jan Jefferson

Sunny. Highs in the mid 30s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southwest this afternoon.

Tonight 15 Jan Jefferson

Mostly cloudy with a slight chance of snow in the Evening, then partly cloudy after midnight. Not as cool. Near steady temperature in the lower 30s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of snow 20 percent.

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Mastodon State Park Temperature Statistics

January Temperature

St. Louis Downtown Airport (18.6 miles)

  • Lowest 4 January, 2026

    19 °F

  • Average January

    42.2 °F

  • Highest 6 January, 2026

    68 °F

Climate (2021–Present)

St. Louis Downtown Airport (18.6 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.7 °F
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