Sudden Valley Weather Forecast

    • 53
    • 75

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

    • 50
    • 71

    Partly Sunny

    • 51
    • 72

    Partly Sunny

    • 51
    • 70

    Partly Sunny

    • 51
    • 69

    Mostly Cloudy

Today 16 Sep Foothills and Valleys of the North Cascades

Sunny. Highs in the 70s to lower 80s. Light wind.

Tonight 16 Sep Foothills and Valleys of the North Cascades

Clear. Lows in the upper 40s to mid 50s. Light wind becoming north to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sudden Valley Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (9.9 miles)

  • Lowest 6 September, 2026

    44.7 °F

  • Average September

    60.4 °F

  • Highest 8 September, 2026

    72.6 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (9.9 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.1 °F
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