Sister Bay Weather Forecast

    • 61
    • 74

    Partly Sunny

    • 64
    • 78

    Slight Chance Thunderstorms

    • 66
    • 80

    Mostly Sunny

    • 65
    • 79

    Chance Thunderstorms

    • 64
    • 78

    Chance Thunderstorms

    • 65
    • 77

    Chance Thunderstorms

Today 2 Aug Door

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

Tonight 2 Aug Door

Mostly clear. Lows around 60. Southwest wind 5 to 10 Mph.

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  • Temperature Forecast NOAA

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Sister Bay Temperature Statistics

August Temperature

Ephraim-Gibraltar Airport (4.3 miles)

  • Lowest

  • Average August

  • Highest

Climate (2015–Present)

Ephraim-Gibraltar Airport (4.3 miles)

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  • Average Low 2015–Present

    37 °F
  • Average 2015–Present

    43.8 °F
  • Average High 2015–Present

    50.9 °F
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