Long Island Weather Forecast

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    Rain

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    Rain Likely

Today 19 Mar San Juan County

Breezy. A chance of rain in the Morning, then rain likely in the late morning and early afternoon. Rain at Times late in the afternoon. Rainfall Amounts less than a tenth of an inch likely. Highs near 50. Southeast wind 15 to 25 Mph with Gusts to 35 Mph.

Tonight 19 Mar San Juan County

Breezy. Rain at Times until early Morning, then cloudy with a chance of rain in the morning. Rainfall Amounts less than a tenth of an inch likely. Lows in the lower to mid 40s. Southeast wind 15 to 25 Mph becoming southwest after midnight. Gusts to 35 Mph.

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  • Temperature Forecast NOAA

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Long Island Temperature Statistics

March Temperature

Friday Harbor Airport (6.8 miles)

  • Lowest 10 March, 2025

    35.1 °F

  • Average March

    45.9 °F

  • Highest 1 March, 2025

    65.6 °F

Climate (2020–Present)

Friday Harbor Airport (6.8 miles)

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  • Average Low 2020–2025

    44.2 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    59.2 °F
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