Stimson Hill Weather Forecast

    • 42
    • 58

    Increasing Clouds

    • 47
    • 58

    Rain

    • 47
    • 52

    Rain

    • 44
    • 56

    Mostly Cloudy

    • 48
    • 61

    Mostly Cloudy

    • 47
    • 60

    Partly Sunny

    • 47
    • 61

    Partly Sunny

Today 27 Sep Foothills and Valleys of the North Cascades

Partly sunny in the morning then becoming sunny. Highs in the 60s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 27 Sep Foothills and Valleys of the North Cascades

Partly cloudy. Lows in the lower to mid 40s. Northwest wind to 10 Mph becoming east after midnight.

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Stimson Hill Temperature Statistics

September Temperature

Arlington Municipal Airport (9.9 miles)

  • Lowest 24 September, 2026

    43 °F

  • Average September

    58.5 °F

  • Highest 9 September, 2026

    78.1 °F

Climate (2021–2026)

Arlington Municipal Airport (9.9 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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