What Is the Temperature in Northern California?

temperature-northern-california Credit: Jordan Siemens/DigitalVision/Getty Images

Average temperatures in Northern California vary by location with average annual temperatures for the region ranging from lows between 47 and 52 degrees Fahrenheit and highs between 68 F and 79 F. Factors such as elevation and proximity to the coast, mountains and desert influence area temperatures.

For example, average August temperatures in San Francisco range from a low of 55 F to a high of 68 F, while those in Sacramento range from a low of 58 F to a high of 91 F. Winter temperatures for both cities average in the high 40s and low 50s.

In the Central Valley, which extends to the northernmost city of Mount Shasta, summer temperatures often exceed 100 F, with average highs in the 80s and 90s. Winter temperatures range from highs in the 60s to lows in the 40s, although the temperature at Mount Shasta reached minus 13 F in December 1990.