Sister Island Rainfall Forecast

Today 3 May
60%
Mon 4 May
10%
Tue 5 May
15%
Wed 6 May
85%
Thu 7 May
80%
Fri 8 May
50%
Sat 9 May
20%

Sister Island Rainfall Statistics

May Rainfall

Portland, Portland International Jetport (17.4 miles)

Total Rainfall 2026
10.1in
Daily Average 2026
0.1in
Wettest Day 16 March, 2026
1.5in
Wet Days 2026
51/123 (41%)
Total Rainfall April
2.1in
Daily Average April
0.1in
Wettest Day 19 April, 2026
0.6in
Wet Days April
13/30 (43%)
Total Rainfall May
–
Daily Average May
–
Wettest Day 3 May, 2026
–
Wet Days May
–

Climate (2010–Present)

Portland, Portland International Jetport (17.4 miles)

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Annual Average 2021–2025
46.1in
Monthly Average 2021–2026
3.8in
Daily Average 2021–2026
0.1in
Wettest Day 14 October, 2022
2.8in

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