Rancho Bernardo (CA) Weather & Climate: Best Time to Visit

Visitors to Rancho Bernardo can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very warm 31°C (88°F) in August, the warmest time of the year, to a pleasant 19°C (66°F) during cooler months like December.

At night, you can expect temperatures ranging from 17°C (63°F) in August to around 6°C (43°F) during December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rancho Bernardo typically sees modest rainfall throughout the year, with an average annual precipitation of 295 mm (12 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 79 mm (3.1 in) of precipitation, recorded across 8 rainy days. In contrast, the driest month June brings less rainfall, with 0.5 mm (0.02 in) over 0 rainy days. For more details, please visit our Rancho Bernardo Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

While the amount of sunshine in Rancho Bernardo varies throughout the year, all seasons offer their own charm. Enjoy up to 10.1 hours of daily sun in July, and experience slightly darker atmosphere in February, with about 7.7 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Rancho Bernardo.

The city experiences its highest humidity in July, reaching 75%. In January, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year