Marietta - Alderwood Weather Forecast

    • 54
    • 70

    Increasing Clouds

    • 54
    • 67

    Slight Chance Rain

    • 53
    • 70

    Partly Sunny

    • 55
    • 73

    Partly Sunny

    • 55
    • 71

    Partly Sunny

    • 54
    • 69

    Chance Rain

Today 6 Sep Lowlands of Western Whatcom County

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

Tonight 6 Sep Lowlands of Western Whatcom County

Partly cloudy. Lows in the lower to mid 50s. Light wind becoming southeast 10 to 15 Mph after midnight.

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Marietta - Alderwood Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (1.2 miles)

  • Lowest 3 September, 2026

    51.1 °F

  • Average September

    62.2 °F

  • Highest 2 September, 2026

    71.7 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (1.2 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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