Humidity Levels in Oregon During May

The average humidity in May is listed below for places in Oregon. The tables give daily averages along with highest and lowest relative humidity levels.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

All the numbers here are averages for the years 1961 to 1990.

Average Humidity

In this table, the Daily number is the average of humidity readings taken every three hours throughout the day. Morning percentages are for 7 am and Afternoon measures are for 4 pm local standard time.

Average relative humidity (%) in May
Daily Place Morning Afternoon
80 Astoria 86 69
74 Eugene 85 54
61 Medford 77 39
52 Pendleton 62 37
69 Portland 80 52
71 Salem 81 54

Highest and Lowest Humidity

Below are the averages during May for maximum and minimum humidity levels in Oregon. The hours when this month's highest and lowest humidity readings usually occur are given in local standard time.

Daily high and low relative humidity (%) averages in May
High Time Place Low Time
89.1 4 am Astoria 69.0 1 pm
90.4 4 am Eugene 54.4 4 pm
82.7 4 am Medford 39.1 4 pm
67.9 4 am Pendleton 36.7 4 pm
84.0 4 am Portland 52.4 4 pm
87.4 4 am Salem 54.0 4 pm

World Data Center for Meteorology. Climate of the World.

Oregon Humidity
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