Semisopochnoi Island Weather Forecast

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    • 49

    Rain Showers Likely

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    • 48

    Rain Showers Likely

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    • 48

    Chance Rain Showers

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    • 47

    Slight Chance Rain

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    Mostly Cloudy

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    Chance Rain Showers

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    Chance Rain Showers

Today 23 Sep Shemya and Attu Islands

Patchy fog in the morning. Mostly cloudy with scattered Showers. Highs in the lower 50s. West wind 25 to 40 Mph.

Tonight 23 Sep Shemya and Attu Islands

Showers likely and a slight chance of Thunderstorms in the Evening, then Showers likely after midnight. Lows in the upper 40s. West wind 40 to 55 Mph. Gusts to 70 Mph increasing to 80 Mph after midnight.

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Semisopochnoi Island Temperature Statistics

September Temperature

Shemya, Eareckson AFB (236.7 miles)

  • Lowest 14 September, 2026

    47.7 °F

  • Average September

    52.1 °F

  • Highest 1 September, 2026

    56.3 °F

Climate (2021–2026)

Shemya, Eareckson AFB (236.7 miles)

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  • Average Low 2021–2026

    38.5 °F

  • Average 2021–2026

    41.1 °F

  • Average High 2021–2026

    43.7 °F
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