Alder Lake Park Weather Forecast

    • 49
    • 68

    Mostly Cloudy

    • 45
    • 64

    Mostly Cloudy

    • 46
    • 63

    Mostly Cloudy

    • 45
    • 60

    Chance Rain

    • 41
    • 56

    Chance Rain

    • 43
    • 59

    Partly Sunny

Today 21 Sep Foothills and Valleys of Pierce and Southern King Counties

Mostly sunny in the morning then becoming partly sunny. Areas of fog in the morning. Highs near 70. Light wind.

Tonight 21 Sep Foothills and Valleys of Pierce and Southern King Counties

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. Light wind.

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Alder Lake Park Temperature Statistics

September Temperature

Fort Lewis / Gray U. S. Army Airfield (24.9 miles)

  • Lowest 19 September, 2026

    45.5 °F

  • Average September

    60.5 °F

  • Highest 9 September, 2026

    82.6 °F

Climate (2021–2026)

Fort Lewis / Gray U. S. Army Airfield (24.9 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    61.4 °F
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