Costa Mesa (CA) Sunshine Hours by Month

When exploring climate, sunlight hours tell an important story. This page shows the total number of hours of direct sunlight per month and the average hours per day in Costa Mesa, California, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages.

Monthly hours of sunshine

Those who love seasonal contrasts will appreciate Costa Mesa. Expect long, bright days with 369 hours in July and darker periods with just 198 hours in January. The total annual amount of sun is 3279 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Costa Mesa. While July receives considerable daily sunshine with up to 12.3 hours, January marks the darkest time of the year, where sunshine is scarce with only 6.6 hours of sunlight per day.

Costa Mesa enjoys an average of 3279 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Barcelona, Spain, there are 2530 hours of sunshine annually and is a city that can be visited year-round.

In contrast, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.

In Shanghai, China, the annual average sunshine is 1780 hours, with cloudier weather in summer.

In Tokyo, Japan, the average annual sunshine is 1930 hours, with sunny periods between rainy seasons.

December, Costa Mesa’s wettest month, receives 4.4 mm (0.2 in) of rainfall and has a maximum daytime temperature of 19°C (66°F). During the driest month August you can expect a temperature of 27°C (81°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Costa Mesa Precipitation page.