Portland - Recent May Temperatures and Rainfall





The numbers here describe what the May weather in Portland, Oregon was like for every year since 2010. A series of tables gives May data by year for temperature and precipitation.

They begin with average maximum and minimum temperatures in degrees Fahrenheit and Celsius. That's followed by how many hot days occurred each May. Then there's information on how much rain actually landed this month during recent years, as well as how often Portland had wet weather.

The climate data come from weather measurements made at the Weather Forecast Office near downtown Portland.

Temperature Weather iconTemperature

May temperature averages by year in Portland
High °F Low °F Year High °C Low °C
73 52 2018 23 11
72 49 2017 22 9
73 51 2016 23 10
71 51 2015 22 10
72 51 2014 22 10
70 49 2013 21 9
68 46 2012 20 8
63 45 2011 17 7
65 47 2010 18 8
Number of days in May when the temperature in Portland rose to at least 70 or 90 degrees Fahrenheit
Year 70 °F
21 °C
90 °F
32 °C
2018 20 2
2017 17 2
2016 18 0
2015 18 0
2014 18 2
2013 13 0
2012 13 0
2011 5 0
2010 8 0

Rainy Weather iconRain

This table gives the total precipitation that fell on Portland during May in each year from 2010. The number of days with precipitation counts the days when rainfall amounted to 0.01 inches (0.254 millimeters) or more.

Total rainfall for May in Portland
Days Year Inches Milli­metres
4 2018 0.3 8
13 2017 2.6 66
9 2016 2.1 53
10 2015 0.7 19
14 2014 2.5 63
17 2013 4.8 122
12 2012 3.8 97
18 2011 4.3 108
17 2010 4.0 103
Reference

Jay Lawrimore. 2016. Global Summary of the Month, Version 1.0. NOAA National Centers for Environmental Information. 

Portland - Recent Years
Portland - Extremes
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