Lummi Island Weather Forecast

    • 53
    • 67

    Mostly Sunny

    • 52
    • 66

    Mostly Sunny

    • 51
    • 64

    Partly Sunny

    • 52
    • 62

    Partly Sunny

    • 53
    • 63

    Partly Sunny

    • 52
    • 63

    Mostly Cloudy

Today 17 Sep Lowlands of Western Whatcom County

Sunny. Highs in the upper 60s to mid 70s. North wind to 10 Mph becoming west in the afternoon.

Tonight 17 Sep Lowlands of Western Whatcom County

Mostly clear. Lows in the upper 40s to mid 50s. Light wind.

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Lummi Island Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (8.1 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 (8.1 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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