Fort Casey Weather Forecast

    • 34
    • 44

    Decreasing Clouds

    • 32
    • 45

    Mostly Sunny

    • 32
    • 44

    Partly Sunny

    • 34
    • 44

    Mostly Cloudy

    • 37
    • 46

    Mostly Cloudy

    • 39
    • 49

    Mostly Cloudy

Today 22 Jan Island County

Mostly cloudy. Highs in the lower to mid 40s. Light wind.

Tonight 22 Jan Island County

Mostly cloudy in the evening then becoming partly cloudy. Lows in the 30s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fort Casey Temperature Statistics

January Temperature

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

  • Lowest 18 January, 2026

    28.9 °F

  • Average January

    43.7 °F

  • Highest 13 January, 2026

    55 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    56.1 °F
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