Port Jefferson Rainfall Forecast

Today 29 Mar
No Rain
Mon 30 Mar
15%
Tue 31 Mar
25%
Wed 1 Apr
45%
Thu 2 Apr
65%
Fri 3 Apr
60%
Sat 4 Apr
60%

Port Jefferson Rainfall Statistics

March Rainfall

Islip, Long Island Mac Arthur Airport (10.6 miles)

Total Rainfall 2026
9.9in
Daily Average 2026
0.1in
Wettest Day 23 February, 2026
2in
Wet Days 2026
35/88 (40%)
Total Rainfall February
3.2in
Daily Average February
0.1in
Wettest Day 23 February, 2026
2in
Wet Days February
10/31 (32%)
Total Rainfall March
4.2in
Daily Average March
0.2in
Wettest Day 5 March, 2026
1.3in
Wet Days March
14/29 (48%)

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
3.7in
Daily Average 2021–2026
0.1in
Wettest Day 16 July, 2023
4.6in

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