Allyn Weather Forecast

    • 53
    • 70

    Increasing Clouds

    • 52
    • 72

    Gradual Clearing

    • 52
    • 73

    Partly Sunny

    • 51
    • 70

    Partly Sunny

    • 49
    • 69

    Mostly Cloudy

    • 51
    • 68

    Mostly Cloudy

    • 51
    • 68

    Chance Rain

Today 18 Sep Olympia and Southern Puget Sound

Partly sunny with a slight chance of rain. Highs in the mid to upper 60s.

Tonight 18 Sep Olympia and Southern Puget Sound

Mostly clear until early morning then becoming mostly cloudy. Lows in the mid 40s to lower 50s. West wind to 10 Mph becoming southwest after midnight.

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Allyn Temperature Statistics

September Temperature

Bremerton, Bremerton National Airport (8.7 miles)

  • Lowest 16 September, 2026

    45 °F

  • Average September

    59.5 °F

  • Highest 9 September, 2026

    81 °F

Climate (2021–2026)

Bremerton, Bremerton National Airport (8.7 miles)

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  • Average Low 2021–2026

    42.4 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    60 °F
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