Cromwell Weather Forecast

    • 55
    • 71

    Increasing Clouds

    • 57
    • 73

    Rain

    • 53
    • 66

    Rain

    • 53
    • 68

    Partly Sunny

    • 56
    • 77

    Mostly Sunny

    • 52
    • 70

    Chance Rain

    • 51
    • 67

    Chance Rain

Today 12 Sep Lowlands of Pierce and Southern King Counties

Mostly cloudy until late afternoon then becoming mostly sunny. Highs in the mid 60s to lower 70s. Light wind.

Tonight 12 Sep Lowlands of Pierce and Southern King Counties

Partly cloudy until early morning then becoming mostly cloudy. Patchy fog late in the night. Lows in the 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cromwell Temperature Statistics

September Temperature

Tacoma, Tacoma Narrows Airport (1.9 miles)

  • Lowest 10 September, 2025

    54 °F

  • Average September

    64.4 °F

  • Highest 3 September, 2025

    81 °F

Climate (2020–Present)

Tacoma, Tacoma Narrows Airport (1.9 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    60.2 °F
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