Bellingham International Airport Weather Forecast

    • 54
    • 67

    Becoming Sunny

    • 51
    • 67

    Mostly Cloudy

    • 50
    • 68

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

Today 13 Sep Lowlands of Western Whatcom County

Partly sunny in the morning then becoming sunny. Highs in the 60s to lower 70s. South wind 10 to 20 Mph.

Tonight 13 Sep Lowlands of Western Whatcom County

Breezy. Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. South wind 15 to 25 Mph.

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Bellingham International Airport Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (0 miles)

  • Lowest 6 September, 2026

    44.7 °F

  • Average September

    60.7 °F

  • Highest 8 September, 2026

    72.6 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (0 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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