Great South Bay Rainfall Forecast

  • 5%
  • 30%
  • No Rain
  • No Rain
  • 5%
  • 20%
  • 15%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

Great South Bay Rainfall Statistics

September Rainfall

Islip, Long Island Mac Arthur Airport (8.1 miles)

  • Total Rainfall September

    1.1in

  • Daily Average September

    0.4in

  • Wettest Day 1 September, 2026

    0.9in

  • Wet Days September

    3/5 (60%)

Climate (2021–2025)

Islip, Long Island Mac Arthur Airport (8.1 miles)

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  • Annual Average 2021–2025

    44.1in

  • Monthly Average 2021–2026

    3.7in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 16 July, 2023

    4.6in
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