Fort Casey Weather Forecast

    • 51
    • 71

    Increasing Clouds

    • 50
    • 68

    Partly Sunny

    • 51
    • 69

    Partly Sunny

    • 53
    • 68

    Rain

    • 50
    • 68

    Chance Rain

    • 51
    • 69

    Chance Rain

Today 17 Sep Island County

Sunny. Highs in the mid 60s to lower 70s. West wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 17 Sep Island County

Partly cloudy. Lows in the lower to mid 50s. West wind 10 to 20 Mph becoming northwest 10 to 15 Mph after midnight.

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  • Temperature Real-Time

Fort Casey Temperature Statistics

September Temperature

Whidbey Island Naval Air Station - Ault Field (13 miles)

  • Lowest 10 September, 2025

    50 °F

  • Average September

    57 °F

  • Highest 13 September, 2025

    66.9 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (13 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    50.1 °F

  • Average High 2020–2025

    56.1 °F
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