The highest day temperature in May 2024 was 83°F. The lowest night temperature was 38°F. The average values for day and night temperatures during May were 62.6°F и 46.2°F respectivly.

Most of the days in May are gloomy but you can also expect sunny days.

Precipitation total in May for Portland is 2.2 in.

The average wind speed in May is 4.7 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Portland in May is 7.8 hours.