Humidity Levels in Washington During April

The average humidity in April is listed below for places in Washington. 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 April
Daily Place Morning Afternoon
76 Olympia 89 57
81 Quillayute 91 67
71 Seattle 82 57
61 Spokane 73 44
52 Yakima 65 33

Highest and Lowest Humidity

Below are the averages during April for maximum and minimum humidity levels in Washington. 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 April
High Time Place Low Time
90.2 4 am Olympia 56.6 4 pm
92.5 4 am Quillayute 66.7 1 pm
82.8 7 am Seattle 57.2 4 pm
76.7 4 am Spokane 43.5 4 pm
70.7 4 am Yakima 33.4 4 pm

World Data Center for Meteorology. Climate of the World.

Washington Humidity
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