Port Jefferson Rainfall Forecast

Today 23 Aug
No Rain
Sun 24 Aug
5%
Mon 25 Aug
35%
Tue 26 Aug
5%
Wed 27 Aug
5%
Thu 28 Aug
5%
Fri 29 Aug
5%

Port Jefferson Rainfall Statistics

August Rainfall

Islip, Long Island Mac Arthur Airport (10.6 miles)

Total Rainfall 2025
23.8in
Daily Average 2025
0.1in
Wettest Day 31 July, 2025
2.9in
Wet Days 2025
82/235 (35%)
Total Rainfall July
5.6in
Daily Average July
0.2in
Wettest Day 31 July, 2025
2.9in
Wet Days July
12/31 (39%)
Total Rainfall August
0.5in
Daily Average August
0.03in
Wettest Day 20 August, 2025
0.3in
Wet Days August
5/23 (22%)

Climate (2010–Present)

Islip, Long Island Mac Arthur Airport (10.6 miles)

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Annual Average 2020–2024
45.6in
Monthly Average 2020–2025
3.8in
Daily Average 2020–2025
0.1in
Wettest Day 16 July, 2023
4.6in

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