Birch Bay Weather Forecast

    • 49
    • 58

    Increasing Clouds

    • 50
    • 59

    Chance Rain

    • 49
    • 61

    Partly Sunny

    • 50
    • 64

    Partly Sunny

    • 51
    • 65

    Partly Sunny

    • 51
    • 63

    Partly Sunny

Today 30 Sep Lowlands of Western Whatcom County

Mostly sunny. Patchy fog in the morning. Highs in the upper 50s to mid 60s. Light wind.

Tonight 30 Sep Lowlands of Western Whatcom County

Mostly cloudy. Patchy fog after midnight. Lows in the mid 40s to lower 50s. Light wind.

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Birch Bay Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (11.8 miles)

  • Lowest 24 September, 2026

    42.7 °F

  • Average September

    58.1 °F

  • Highest 8 September, 2026

    72.6 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (11.8 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.1 °F
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