San Bernardino (CA) Climate by Month
The temperature in San Bernardino can vary quite a bit throughout the year.
Temperatures can be very hot during the warmest months,
and pleasant during the cooler months.
San Bernardino has a dry climate with relatively low precipitation levels.
Let’s explore the climate details in depth to provide you with a complete overview.
Average day and night temperature
Visitors to San Bernardino can expect significant temperature changes throughout the year. On average, daytime temperatures range from a very hot 35°C in August to a pleasant 19°C in December. Nighttime temperatures can drop, with averages reaching 6°C in December.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
San Bernardino's climate is marked by below-average rainfall, accumulating 276 mm of precipitation yearly. The seasons in San Bernardino, bring significant changes in precipitation. The wettest month, December, receives moderate rainfall, with an average of 86 mm of precipitation. This rainfall is distributed across 7 rainy days. In contrast, the driest month, June, experiences much less rainfall, totaling 0.2 mm over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In San Bernardino, summer days are longer and more sunny, with daily sunshine hours peaking at 12.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 6.6 hours.Monthly hours of sunshine
Daily hours of sunshine
The best time of year to visit San Bernardino in the United States of America
During the months of February, March, April and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Yes, the months of May, June, July, August, September and October are very dry.
August has an average maximum temperature of 35°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 19°C.
December tops the wettest month list with 86 mm of rainfall.
June is the driest month with 0 mm of precipitation.
July is the sunniest month with an average of 369 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
