Mark Twain National Wildlife Refuge Weather Forecast

    • 50
    • 68

    Mostly Cloudy

    • 53
    • 69

    Chance Rain Showers

    • 55
    • 77

    Mostly Cloudy

    • 56
    • 79

    Partly Sunny

    • 59
    • 84

    Partly Sunny

    • 62
    • 85

    Chance Thunderstorms

Today 21 May Mercer

Partly sunny. Highs in the upper 60s. East Winds 10 to 15 Mph.

Tonight 21 May Mercer

Mostly cloudy. Lows around 50. East Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Mark Twain National Wildlife Refuge Temperature Statistics

May Temperature

Muscatine (19.3 miles)

  • Lowest 7 May, 2026

    32 °F

  • Average May

    61.2 °F

  • Highest 17 May, 2026

    86 °F

Climate (2021–Present)

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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