Sumner Island Weather Forecast

    • 41
    • 52

    Chance Rain Showers

    • 44
    • 53

    Partly Sunny

    • 46
    • 51

    Rain Showers

    • 46
    • 52

    Rain Showers

    • 44
    • 52

    Rain Showers

    • 44
    • 53

    Rain Showers

    • 44
    • 52

    Rain Showers

Today 24 Sep Western Kupreanof and Kuiu Island

Mostly cloudy. Chance of rain Showers. Highs in the mid 50s.

Tonight 24 Sep Western Kupreanof and Kuiu Island

Mostly cloudy early in the evening then clearing. Near port Alexander, slight chance of rain Showers early in the evening. Patchy fog late. Lows in the lower 40s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumner Island Temperature Statistics

September Temperature

Kake - Kake Airport (38.5 miles)

  • Lowest 12 September, 2026

    41 °F

  • Average September

    52.9 °F

  • Highest 3 September, 2026

    69.1 °F

Climate (2021–2026)

Kake - Kake Airport (38.5 miles)

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  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    43.9 °F

  • Average High 2021–2026

    48.8 °F
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