Ayer Reservoir Weather Forecast

    • 57
    • 74

    Mostly Sunny

    • 56
    • 70

    Mostly Sunny

    • 55
    • 68

    Mostly Sunny

    • 55
    • 69

    Mostly Sunny

    • 56
    • 65

    Rain Likely

    • 55
    • 66

    Rain Likely

Today 16 Sep San Juan County

Sunny. Highs in the 70s. North wind to 10 Mph becoming east in the afternoon.

Tonight 16 Sep San Juan County

Clear. Lows in the 50s. Northeast wind to 10 Mph becoming south after midnight.

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Ayer Reservoir Temperature Statistics

September Temperature

Eastsound, Orcas Island Airport (5 miles)

  • Lowest 11 September, 2025

    51.8 °F

  • Average September

    62 °F

  • Highest 2 September, 2025

    73.4 °F

Climate (2020–Present)

Eastsound, Orcas Island Airport (5 miles)

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  • Average Low 2020–2025

    46.1 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    57.6 °F
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