Lummi Island - Bumstead Spit Weather Forecast

    • 53
    • 59

    Increasing Clouds

    • 55
    • 63

    Partly Sunny

    • 54
    • 62

    Partly Sunny

    • 51
    • 61

    Mostly Cloudy

    • 53
    • 60

    Chance Rain

    • 51
    • 58

    Chance Rain

Today 20 Sep Lowlands of Western Whatcom County

Partly sunny in the morning then becoming sunny. Areas of fog in the Morning, then patchy fog late in the morning. Highs in the mid 60s to lower 70s. Light wind.

Tonight 20 Sep Lowlands of Western Whatcom County

Partly cloudy. Areas of fog in the morning. Lows near 50. Light wind.

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Lummi Island - Bumstead Spit Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (8.1 miles)

  • Lowest 18 September, 2026

    44.1 °F

  • Average September

    59.9 °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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