Joint Base Lewis - McChord Weather Forecast

    • 57
    • 83

    Areas Smoke

    • 56
    • 82

    Partly Sunny

    • 54
    • 81

    Partly Sunny

    • 53
    • 77

    Mostly Cloudy

    • 54
    • 75

    Mostly Cloudy

    • 57
    • 75

    Mostly Cloudy

Today 31 Jul Lowlands of Pierce and Southern King Counties

Mostly sunny. Highs in the mid 70s to lower 80s. Light wind.

Tonight 31 Jul Lowlands of Pierce and Southern King Counties

Mostly cloudy. Haze and Areas of smoke in the evening. A slight chance of Showers after midnight. Lows in the mid 50s to lower 60s. West wind to 10 Mph becoming southwest after midnight.

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Joint Base Lewis - McChord Temperature Statistics

July Temperature

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

  • Lowest 20 July, 2025

    48.7 °F

  • Average July

    67.1 °F

  • Highest 16 July, 2025

    95.2 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    42.6 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    61.2 °F
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