Port Jefferson Rainfall Forecast

  • 35%
  • 45%
  • No Rain
  • 40%
  • 85%
  • 30%
  • 10%
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  • Rainfall Probability Forecast NOAA

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Port Jefferson Rainfall Statistics

May Rainfall

Islip, Long Island Mac Arthur Airport (10.6 miles)

  • Total Rainfall May

    0.3in

  • Daily Average May

    0.04in

  • Wettest Day 7 May, 2026

    0.2in

  • Wet Days May

    3/10 (30%)

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (10.6 miles)

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  • Annual Average 2021–2025

    44.1in

  • Monthly Average 2021–2026

    3.6in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 16 July, 2023

    4.6in
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