Birch Bay Weather Forecast

    • 53
    • 64

    Slight Chance Rain

    • 53
    • 67

    Mostly Sunny

    • 54
    • 67

    Mostly Sunny

    • 54
    • 65

    Partly Sunny

    • 53
    • 65

    Partly Sunny

    • 54
    • 66

    Partly Sunny

    • 54
    • 65

    Mostly Cloudy

Today 15 Sep Lowlands of Western Whatcom County

Partly sunny. A chance of rain in the Morning, then a slight chance of rain in the afternoon. Highs near 70.

Tonight 15 Sep Lowlands of Western Whatcom County

Mostly clear. Patchy fog late in the night. Lows in the upper 40s to mid 50s. West wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Birch Bay Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (11.8 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 (11.8 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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