Great South Bay Rainfall Forecast

Today 22 Jul
70%
Thu 23 Jul
10%
Fri 24 Jul
No Rain
Sat 25 Jul
5%
Sun 26 Jul
5%
Mon 27 Jul
30%
Tue 28 Jul
40%

Great South Bay Rainfall Statistics

July Rainfall

Islip, Long Island Mac Arthur Airport (8.1 miles)

Total Rainfall 2026
20.9in
Daily Average 2026
0.1in
Wettest Day 6 July, 2026
2.5in
Wet Days 2026
77/203 (38%)
Total Rainfall June
0.8in
Daily Average June
0.03in
Wettest Day 15 June, 2026
0.2in
Wet Days June
12/30 (40%)
Total Rainfall July
5.3in
Daily Average July
0.3in
Wettest Day 6 July, 2026
2.5in
Wet Days July
6/22 (27%)

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
3.6in
Daily Average 2021–2026
0.1in
Wettest Day 16 July, 2023
4.6in

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