Mark Twain State Park Weather Forecast

    • 66
    • 89

    Mostly Sunny

    • 74
    • 94

    Chance Rain Showers

    • 66
    • 89

    Rain Showers

    • 61
    • 79

    Chance Rain Showers

    • 65
    • 82

    Chance Rain Showers

    • 64
    • 85

    Slight Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

Today 7 Sep Monroe

Sunny. Highs in the upper 80s. Southeast Winds 5 to 10 Mph.

Tonight 7 Sep Monroe

Mostly clear this Evening, then becoming partly cloudy. Lows in the mid 60s. Southeast Winds 5 to 10 Mph.

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Mark Twain State Park Temperature Statistics

September Temperature

Quincy Regional Airport-Baldwin Field (45.4 miles)

  • Lowest 1 September, 2026

    72.6 °F

  • Average September

    86.2 °F

  • Highest 1 September, 2026

    99.6 °F

Climate (2021–2026)

Quincy Regional Airport-Baldwin Field (45.4 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    65.6 °F
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