Roche Harbor Weather Forecast

    • 47
    • 54

    Rain

    • 44
    • 51

    Chance Rain

    • 45
    • 49

    Chance Rain

    • 47
    • 51

    Rain

    • 47
    • 52

    Rain

    • 44
    • 53

    Rain

Today 10 Dec San Juan County

Rain. Patchy fog in the afternoon. Rainfall Amounts one to three Inches possible. Highs in the lower to mid 50s. Southwest wind 10 to 15 Mph becoming south in the afternoon.

Tonight 10 Dec San Juan County

Patchy fog in the evening. Rain at Times in the Evening, then a chance of rain after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the 40s. Southwest wind around 10 Mph becoming west after midnight.

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Roche Harbor Temperature Statistics

December Temperature

Friday Harbor Airport (8.1 miles)

  • Lowest 1 December, 2025

    36 °F

  • Average December

    45 °F

  • Highest 5 December, 2025

    52 °F

Climate (2020–Present)

Friday Harbor Airport (8.1 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    51.8 °F

  • Average High 2020–2025

    59.6 °F
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