Cottonwood Beach Weather Forecast

    • 48
    • 62

    Slight Chance Rain

    • 51
    • 61

    Rain

    • 49
    • 60

    Rain

    • 47
    • 60

    Mostly Cloudy

    • 48
    • 61

    Chance Rain

    • 49
    • 61

    Chance Rain

    • 50
    • 62

    Chance Rain

Today 23 Sep Lowlands of Western Whatcom County

Mostly cloudy with a slight chance of rain. Highs in the mid to upper 60s.

Tonight 23 Sep Lowlands of Western Whatcom County

Mostly cloudy then becoming partly cloudy after midnight then becoming mostly cloudy. Patchy fog late in the night. Lows in the mid 40s to lower 50s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cottonwood Beach Temperature Statistics

September Temperature

Bellingham, Bellingham International Airport (13.7 miles)

  • Lowest 18 September, 2026

    43.6 °F

  • Average September

    59.4 °F

  • Highest 8 September, 2026

    72.6 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (13.7 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.2 °F
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