Griswold Island Rainfall Forecast

  • 5%
  • 5%
  • 25%
  • No Rain
  • 60%
  • 45%
  • 40%
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  • Rainfall Probability Forecast NOAA

  • Rain Today Real-Time

Griswold Island Rainfall Statistics

September Rainfall

Groton / New London, Groton / New London Airport (9.3 miles)

  • Total Rainfall September

    2.3in

  • Daily Average September

    0.2in

  • Wettest Day 13 September, 2026

    1.7in

  • Wet Days September

    5/16 (31%)

Climate (2021–2025)

Groton / New London, Groton / New London Airport (9.3 miles)

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  • Annual Average 2021–2025

    37.8in

  • Monthly Average 2021–2026

    3.2in

  • Daily Average 2021–2026

    0.1in

  • Wettest Day 11 December, 2024

    3in
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