Oregon Zoo Rainfall Forecast

Today 18 May
No Rain
Tue 19 May
No Rain
Wed 20 May
No Rain
Thu 21 May
No Rain
Fri 22 May
No Rain
Sat 23 May
No Rain
Sun 24 May
20%

Oregon Zoo Rainfall Statistics

May Rainfall

Portland, Portland International Airport (7.5 miles)

Total Rainfall 2026
15.6in
Daily Average 2026
0.1in
Wettest Day 12 March, 2026
1.7in
Wet Days 2026
58/138 (42%)
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
0.03in
Wettest Day 14 May, 2026
0.2in
Wet Days May
4/18 (22%)

Climate (2010–Present)

Portland, Portland International Airport (7.5 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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