Great Diamond Island Rainfall Forecast

Today 14 Sep
20%
Tue 15 Sep
No Rain
Wed 16 Sep
No Rain
Thu 17 Sep
35%
Fri 18 Sep
45%
Sat 19 Sep
25%
Sun 20 Sep
30%

Great Diamond Island Rainfall Statistics

September Rainfall

Portland, Portland International Jetport (5 miles)

Total Rainfall 2026
27.3in
Daily Average 2026
0.1in
Wettest Day 14 May, 2026
2in
Wet Days 2026
98/257 (38%)
Total Rainfall August
2.7in
Daily Average August
0.1in
Wettest Day 13 August, 2026
1.4in
Wet Days August
7/31 (23%)
Total Rainfall September
0.5in
Daily Average September
0.04in
Wettest Day 10 September, 2026
0.3in
Wet Days September
6/14 (43%)

Climate (2021–2025)

Portland, Portland International Jetport (5 miles)

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Annual Average 2021–2025
46.1in
Monthly Average 2021–2026
3.9in
Daily Average 2021–2026
0.1in
Wettest Day 14 October, 2022
2.8in

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