Mark Twain National Wildlife Refuge Weather Forecast

    • 74
    • 95

    Mostly Sunny

    • 69
    • 93

    Mostly Sunny

    • 65
    • 87

    Partly Sunny

    • 68
    • 87

    Partly Sunny

    • 74
    • 94

    Partly Sunny

    • 71
    • 93

    Chance Rain Showers

Today 4 Sep Mercer

Mostly sunny. Hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Heat index Values up to 106.

Tonight 4 Sep Mercer

Partly cloudy in the Evening, then becoming mostly clear. Humid with Lows in the mid 70s. South Winds around 5 Mph. Heat index Values up to 104 early in the evening.

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Mark Twain National Wildlife Refuge Temperature Statistics

September Temperature

Muscatine (19.3 miles)

  • Lowest 1 September, 2026

    73.4 °F

  • Average September

    83.4 °F

  • Highest 1 September, 2026

    96.8 °F

Climate (2021–2026)

Muscatine (19.3 miles)

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  • Average Low 2021–2026

    42.4 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    63.5 °F
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