Newhalem Weather Forecast

    • 44
    • 58

    Rain

    • 40
    • 52

    Rain

    • 42
    • 57

    Partly Sunny

    • 46
    • 60

    Chance Rain

    • 42
    • 60

    Partly Sunny

    • 46
    • 66

    Partly Sunny

    • 47
    • 68

    Partly Sunny

Today 28 Sep Foothills and Valleys of the North Cascades

Partly sunny. Highs near 70.

Tonight 28 Sep Foothills and Valleys of the North Cascades

A chance of rain in the Evening, then rain after midnight. Rainfall Amounts a half inch to one inch possible. Lows in the lower 50s. South wind 10 to 15 Mph becoming southeast 10 to 20 Mph after Midnight, Gusts to 30 Mph increasing to 40 Mph after midnight.

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Newhalem Temperature Statistics

September Temperature

Arlington Municipal Airport (54.7 miles)

  • Lowest 26 September, 2026

    42.1 °F

  • Average September

    58.3 °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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