Stony Brook Rainfall Forecast

Today 9 Aug
15%
Mon 10 Aug
35%
Tue 11 Aug
30%
Wed 12 Aug
10%
Thu 13 Aug
45%
Fri 14 Aug
15%
Sat 15 Aug
15%

Stony Brook Rainfall Statistics

August Rainfall

Islip, Long Island Mac Arthur Airport (8.7 miles)

Total Rainfall 2026
25.8in
Daily Average 2026
0.1in
Wettest Day 6 July, 2026
2.5in
Wet Days 2026
84/221 (38%)
Total Rainfall July
7.6in
Daily Average July
0.2in
Wettest Day 6 July, 2026
2.5in
Wet Days July
9/31 (29%)
Total Rainfall August
2.6in
Daily Average August
0.4in
Wettest Day 3 August, 2026
1.9in
Wet Days August
4/9 (44%)

Climate (2021–2025)

Islip, Long Island Mac Arthur Airport (8.7 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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