Mark Twain National Wildlife Refuge Weather Forecast

    • 73
    • 90

    Chance Thunderstorms

    • 68
    • 93

    Mostly Sunny

    • 70
    • 88

    Mostly Sunny

    • 73
    • 93

    Slight Chance Thunderstorms

    • 63
    • 88

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

Today 17 Jul Mercer

Sunny. A chance of Showers and Thunderstorms in the afternoon. Hot with Highs around 90. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 101.

Tonight 17 Jul Mercer

Mostly clear. Near steady temperature in the mid 70s. South Winds around 5 Mph.

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Mark Twain National Wildlife Refuge Temperature Statistics

July Temperature

Muscatine (19.3 miles)

  • Lowest 7 July, 2026

    62.6 °F

  • Average July

    78.2 °F

  • Highest 1 July, 2026

    95 °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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