Average Sunshine in California for December





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 December
City Sunny
Days
Partly Sunny
Days
Total Days
With Sun
Bakersfield 7 8 15
Bishop 14 7 21
Blue Canyon 9 5 14
Eureka 6 7 13
Fresno 7 6 13
Long Beach 13 8 21
Los Angeles Airport 13 8 21
Los Angeles Downtown 15 8 23
Mount Shasta 7 8 15
Redding 10 5 15
Sacramento 8 6 14
San Diego 14 8 22
San Francisco Airport 9 8 17
Santa Maria 14 7 21
Stockton 7 7 14

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 December
City % Sun
Eureka 41
Fresno 46
Los Angeles Downtown 71
Redding 73
Sacramento 49
San Diego 73
San Francisco Downtown 53
Reference

National Climatic Data Center. Comparative Climatic Data.

California Sunshine
Back to Top