Joint Base Lewis - McChord Weather Forecast

    • 57
    • 84

    Chance Rain

    • 56
    • 73

    Chance Rain

    • 55
    • 75

    Mostly Cloudy

    • 56
    • 80

    Mostly Sunny

    • 55
    • 81

    Partly Sunny

    • 53
    • 75

    Mostly Cloudy

Today 21 Aug Lowlands of Pierce and Southern King Counties

Mostly sunny in the morning then becoming mostly cloudy. Highs in the mid 70s to lower 80s. North wind around 10 Mph.

Tonight 21 Aug Lowlands of Pierce and Southern King Counties

Mostly cloudy. A slight chance of Showers in the morning. Lows in the mid 50s to lower 60s. West wind 10 to 15 Mph becoming southwest after midnight.

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Joint Base Lewis - McChord Temperature Statistics

August Temperature

Fort Lewis / Gray U. S. Army Airfield (0.6 miles)

  • Lowest 3 August, 2026

    46.9 °F

  • Average August

    67.1 °F

  • Highest 6 August, 2026

    89.6 °F

Climate (2021–2026)

Fort Lewis / Gray U. S. Army Airfield (0.6 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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