San Bernardino 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 San Bernardino, Grisons, Switzerland. These averages rely on historical data collected over 30 years, from 1990 to 2020.

Monthly hours of sunshine

Sunshine in San Bernardino varies greatly throughout the year. The sunniest month, July, reaches an impressive 196 hours, while December, the darkest month, offers only 72 hours. The total annual amount of sun is 1582 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in San Bernardino. While July receives considerable daily sunshine with up to 6.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.4 hours of sunlight per day.

Average percent of sunshine

On average the sun shines 52% of the time during the day in August, the highest percentage of any month. May has the lowest percentage at 40%.

San Bernardino enjoys an average of 1582 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

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

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

June, San Bernardino’s wettest month, receives 155 mm (6.1 in) of rainfall and has a maximum daytime temperature of 16°C (61°F). During the driest month February you can expect a temperature of -1°C (30°F).

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