Sister Islands State Natural Area Weather Forecast

    • 48
    • 68

    Mostly Sunny

    • 48
    • 63

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 49
    • 66

    Mostly Sunny

    • 50
    • 68

    Mostly Sunny

    • 51
    • 69

    Mostly Sunny

Today 27 May Door

Partly cloudy in the morning then clearing. Patchy fog in the morning. Highs in the middle 70s. Northeast wind 5 to 10 Mph.

Tonight 27 May Door

Clear. Lows in the upper 40s. North wind 10 to 15 Mph.

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Sister Islands State Natural Area Temperature Statistics

May Temperature

Ephraim-Gibraltar Airport (6.2 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    47.4 °F

  • Highest 16 May, 2026

    81 °F

Climate (2021–Present)

Ephraim-Gibraltar Airport (6.2 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    52.6 °F
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