Mark Twain Lake Weather Forecast

    • 79
    • 93

    Partly Sunny

    • 78
    • 93

    Mostly Sunny

    • 76
    • 93

    Slight Chance Thunderstorms

    • 78
    • 89

    Chance Thunderstorms

    • 78
    • 90

    Slight Chance Thunderstorms

    • 78
    • 91

    Mostly Sunny

Today 22 Jul Monroe

Mostly sunny. Humid with Highs in the lower 90s. Southeast Winds 5 to 10 Mph. Heat index Values up to 107.

Tonight 22 Jul Monroe

Partly cloudy. Humid with Lows in the mid 70s. Southeast Winds 5 to 10 Mph. Heat index Values up to 108 early in the evening.

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Mark Twain Lake Temperature Statistics

July Temperature

Quincy Regional Airport-Baldwin Field (42.9 miles)

  • Lowest 1 July, 2025

    65.6 °F

  • Average July

    77.8 °F

  • Highest 11 July, 2025

    93.7 °F

Climate (2020–Present)

Quincy Regional Airport-Baldwin Field (42.9 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    55 °F

  • Average High 2020–2025

    64.7 °F
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