Harper Weather Forecast

    • 51
    • 65

    Increasing Clouds

    • 52
    • 68

    Mostly Cloudy

    • 53
    • 69

    Chance Rain

    • 54
    • 68

    Slight Chance Rain

    • 54
    • 65

    Partly Sunny

    • 55
    • 69

    Partly Sunny

    • 55
    • 68

    Partly Sunny

Today 4 Sep Eastern Kitsap County

Partly sunny. A chance of Showers in the morning. Highs in the mid 60s to lower 70s. Light wind.

Tonight 4 Sep Eastern Kitsap County

Partly cloudy. Lows in the upper 40s to mid 50s. North wind around 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Harper Temperature Statistics

September Temperature

Boeing Field - King County International Airport (9.3 miles)

  • Lowest 2 September, 2026

    55 °F

  • Average September

    62.3 °F

  • Highest 2 September, 2026

    71.1 °F

Climate (2021–2026)

Boeing Field - King County International Airport (9.3 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    61.6 °F
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