Long Island Weather Forecast

    • 52
    • 63

    Mostly Cloudy

    • 52
    • 60

    Chance Rain Showers

    • 52
    • 59

    Chance Rain Showers

    • 52
    • 61

    Slight Chance Rain Showers

    • 53
    • 63

    Mostly Sunny

    • 54
    • 67

    Mostly Sunny

    • 55
    • 68

    Mostly Sunny

Today 24 Jun San Juan County

Mostly sunny until late afternoon then becoming mostly cloudy. Highs in the mid 60s to lower 70s. Light wind becoming south to 10 Mph in the afternoon.

Tonight 24 Jun San Juan County

Mostly cloudy. Lows in the lower to mid 50s. Southwest wind to 10 Mph.

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  • Temperature Forecast NOAA

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Long Island Temperature Statistics

June Temperature

Friday Harbor Airport (6.8 miles)

  • Lowest 2 June, 2025

    43.6 °F

  • Average June

    57.6 °F

  • Highest 8 June, 2025

    84.7 °F

Climate (2020–Present)

Friday Harbor Airport (6.8 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    59.5 °F
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