Port Jefferson Harbor Entrance Rainfall Forecast

Today 6 May
100%
Wed 7 May
45%
Thu 8 May
15%
Fri 9 May
50%
Sat 10 May
35%
Sun 11 May
15%
Mon 12 May
10%

Port Jefferson Harbor Entrance Rainfall Statistics

May Rainfall

Islip, Long Island Mac Arthur Airport (11.8 miles)

Total Rainfall 2025
11.2in
Daily Average 2025
0.1in
Wettest Day 16 February, 2025
1.4in
Wet Days 2025
40/126 (32%)
Total Rainfall April
2in
Daily Average April
0.1in
Wettest Day 26 April, 2025
0.6in
Wet Days April
12/30 (40%)
Total Rainfall May
0.1in
Daily Average May
0.05in
Wettest Day 2 May, 2025
0.1in
Wet Days May
1/6 (17%)

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (11.8 miles)

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Annual Average 2020–2024
45.6in
Monthly Average 2020–2025
3.7in
Daily Average 2020–2025
0.1in
Wettest Day 16 July, 2023
4.6in

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