Average Sunshine in California for September





Number of Sunny Days

In the table below, the average number of Sunny Days for a city in California is the total days this month when the sky is mostly clear. This includes the days when cloud covers up to 30% of the sky during daylight hours.

Partly Sunny Days have cloud covering from 40% to 70% of the sky during the daytime.

Total Days With Sun is a sum of the Sunny plus Partly Sunny days. The rest of the days are mainly overcast, with at least 80% cloud cover. All the numbers are annual averages, made from years of weather watching.

Days of sunshine in September
City Sunny
Days
Partly Sunny
Days
Total Days
With Sun
Bakersfield 24 4 28
Bishop 23 5 28
Blue Canyon 22 4 26
Eureka 9 9 18
Fresno 24 4 28
Long Beach 15 11 26
Los Angeles Airport 13 10 23
Los Angeles Downtown 18 8 26
Mount Shasta 21 5 26
Redding 22 4 26
Sacramento 24 4 28
San Diego 15 10 25
San Francisco Airport 18 8 26
Santa Maria 16 10 26
Stockton 23 4 27

Amount of Sun

Here's another way to look at how much sunshine a city gets. The % Sun number measures the percentage of time between sunrise and sunset that sunshine reaches the ground. Again, these amounts are monthly averages based on many years of weather observations.

Percent sunshine for September
City % Sun
Eureka 55
Fresno 94
Los Angeles Downtown 79
Redding 94
Sacramento 93
San Diego 69
San Francisco Downtown 72
Reference

National Climatic Data Center. Comparative Climatic Data.

California Sunshine
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