Sumner Island Weather Forecast

    • 49
    • 63

    Partly Sunny

    • 50
    • 65

    Partly Sunny

    • 52
    • 69

    Mostly Sunny

    • 53
    • 70

    Mostly Sunny

    • 51
    • 68

    Partly Sunny

    • 51
    • 66

    Partly Sunny

Today 10 Aug Western Kupreanof and Kuiu Island

Increasing Clouds. Highs 61 to 66. Light Winds.

Tonight 10 Aug Western Kupreanof and Kuiu Island

Mostly cloudy. Lows in the lower 50s. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Island Temperature Statistics

August Temperature

Kake - Kake Airport (38.5 miles)

  • Lowest 4 August, 2026

    46 °F

  • Average August

    56.6 °F

  • Highest 2 August, 2026

    64 °F

Climate (2021–2026)

Kake - Kake Airport (38.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    43.8 °F

  • Average High 2021–2026

    48.7 °F
Get WillyWeather+ to remove ads