Newhalem Weather Forecast

    • 49
    • 71

    Becoming Sunny

    • 50
    • 74

    Mostly Sunny

    • 45
    • 70

    Partly Sunny

    • 42
    • 64

    Partly Sunny

    • 43
    • 61

    Slight Chance Rain

    • 42
    • 60

    Chance Rain

Today 19 Sep Foothills and Valleys of the North Cascades

Mostly sunny. Highs in the upper 60s to mid 70s. Light wind.

Tonight 19 Sep Foothills and Valleys of the North Cascades

Mostly clear. Lows near 50. Light wind.

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Newhalem Temperature Statistics

September Temperature

Arlington Municipal Airport (54.7 miles)

  • Lowest 16 September, 2026

    44.1 °F

  • Average September

    59.9 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (54.7 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.9 °F
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