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San Ramon, CA Weather


San Ramon, CA climate is warm during summer when temperatures tend to be in the 70's and cold during winter when temperatures tend to be in the 40's.

The warmest month of the year is July with an average maximum temperature of 85.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 39.30 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 26 degrees Fahrenheit, and fairly limited during winter with an average difference of 16 degrees Fahrenheit.

The annual average precipitation at San Ramon is 23.96 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 4.76 Inches.

Weather Data

Normal Climate

Normal Temperatures

(MOUNT DIABLO JUNCTION Weather station, 7.37 miles from San Ramon)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Max °F 55.6 57.2 59.2 64.8 70.8 78.7 85.2 85.1 82.2 74.4 61.9 56.2 69.3
Mean °F 47.5 49.0 50.0 54.1 59.1 66.0 72.4 72.3 69.9 63.1 52.8 48.0 58.7
Min °F 39.3 40.7 40.7 43.3 47.4 53.2 59.6 59.5 57.5 51.8 43.7 39.7 48.0

Normal Precipitation

(MOUNT DIABLO JUNCTION Weather station, 7.37 miles from San Ramon)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
Inch 4.76 4.49 3.83 1.46 0.85 0.15 0.05 0.08 0.36 1.31 3.27 3.35 23.96