Sister Bay Weather Forecast

    • 49
    • 77

    Mostly Sunny

    • 48
    • 64

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

    • 54
    • 73

    Mostly Sunny

    • 56
    • 74

    Partly Sunny

    • 55
    • 78

    Partly Sunny

Today 29 May Door

Warmer. Mostly sunny. Nearly steady temperature in the upper 70s. Southwest wind 5 to 10 Mph.

Tonight 29 May Door

Clear. Lows around 50. East wind 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sister Bay Temperature Statistics

May Temperature

Ephraim-Gibraltar Airport (4.3 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    49.3 °F

  • Highest 26 May, 2026

    83.8 °F

Climate (2021–Present)

Ephraim-Gibraltar Airport (4.3 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    45.5 °F

  • Average High 2021–2026

    52.7 °F
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