Humidity Levels in California During August

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The average humidity in August is listed below for places in California. 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 August
Daily Place Morning Afternoon
Southern California
39 Bakersfield 51 24
69 Long Beach 78 53
77 Los Angeles 82 68
74 San Diego 79 66
77 Santa Barbara 84 65
80 Santa Maria 90 62
Northern California
45 Fresno 61 25
56 Sacramento 75 29
75 San Francisco 83 61
48 Stockton 65 28


Highest and Lowest Humidity

Below are the averages during August for maximum and minimum humidity levels in California. 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 August
High Time Place Low Time
Southern California
53.5 4 am Bakersfield 24.3 4 pm
81.0 4 am Long Beach 52.0 1 pm
85.2 4 am Los Angeles 64.3 1 pm
81.0 4 am San Diego 64.0 1 pm
85.6 4 am Santa Barbara 62.9 1 pm
93.0 4 am Santa Maria 57.0 1 pm
Northern California
66.6 4 am Fresno 24.6 4 pm
77.7 4 am Sacramento 29.0 4 pm
86.4 4 am San Francisco 56.7 1 pm
66.8 4 am Stockton 27.6 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

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