Humidity Levels in Washington During October

The average humidity in October 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 October
Daily Place Morning Afternoon
85 Olympia 94 68
87 Quillayute 94 75
79 Seattle 87 67
67 Spokane 81 49
63 Yakima 79 41

Highest and Lowest Humidity

Below are the averages during October 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 October
High Time Place Low Time
94.1 7 am Olympia 67.8 4 pm
94.1 7 am Quillayute 72.8 1 pm
86.8 7 am Seattle 67.0 4 pm
81.3 7 am Spokane 48.7 4 pm
79.0 7 am Yakima 40.7 4 pm

World Data Center for Meteorology. Climate of the World.

Washington Humidity
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