Average humidity in San Bruno (CA)
On this page you find more information about the monthly relative humidity over the year in San Bruno (California), the United States of America.
San Bruno's humidity levels vary throughout the year. The highest levels occur in January, reaching 80% (very high), while the lowest is recorded in June at 71%.
Throughout the year, the average humidity in San Bruno is 75%.
Humidity plays an important role in how temperatures are felt. During the warmest month, September, the maximum average temperature is around 23°C (73°F). Combined with high humidity during this period, the temperature can feel even warmer than the thermometer shows.
During the coldest month, December, the maximum average temperature is around 14°C (57°F). This period has high humidity. Check out our detailed temperature page for more information.
San Bruno Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Bruno - and find the best time to visit.
San Bruno 3-Day Forecast
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Bruno climate overview or explore weather in the United States of America.
Popular this month
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.