Columbia River - Government Island Rainfall Forecast

Today 24 May
No Rain
Mon 25 May
80%
Tue 26 May
60%
Wed 27 May
5%
Thu 28 May
15%
Fri 29 May
20%
Sat 30 May
5%

Columbia River - Government Island Rainfall Statistics

May Rainfall

Portland, Portland International Airport (5 miles)

Total Rainfall 2026
15.6in
Daily Average 2026
0.1in
Wettest Day 12 March, 2026
1.7in
Wet Days 2026
58/144 (40%)
Total Rainfall April
2.7in
Daily Average April
0.1in
Wettest Day 15 April, 2026
0.5in
Wet Days April
10/30 (33%)
Total Rainfall May
0.4in
Daily Average May
0.02in
Wettest Day 14 May, 2026
0.2in
Wet Days May
4/24 (17%)

Climate (2010–Present)

Portland, Portland International Airport (5 miles)

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Annual Average 2021–2025
37.4in
Monthly Average 2021–2026
3.2in
Daily Average 2021–2026
0.1in
Wettest Day 26 December, 2022
2.1in

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