San Ramon (CA) Weather and Climate: A Comprehensive Guide
The temperature in San Ramon can vary greatly throughout the year.
The temperatures shift from very warm
to mild.
It receives mid-range precipitation levels.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from very warm to moderate in San Ramon. Average maximum daytime temperatures range from a very warm 30°C in July, the warmest time of the year, to a moderate 14°C during cooler months like December.
At night, temperatures typically drop to an average of around 4°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Generally, San Ramon has a moderate amount of precipitation, averaging 517 mm of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, December receives high rainfall, averaging 111 mm of precipitation, recorded across 13 rainy days. In contrast, the drier season, August brings less rainfall, with 0.1 mm over 0 rainy days. For more details, please visit our San Ramon Precipitation page.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
Seasonal changes in sunshine hours are quite dramatic in San Ramon. While May receives considerable daily sunshine with up to 10.8 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.3 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in San Ramon.
The city experiences its highest humidity in January, reaching 80%. In June, the humidity drops to its lowest level at 71%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
broken clouds and slight rain broken clouds and chance of slight rain broken clouds and rainForecast for San Ramon (CA)
5 m/s
4 m/s
6 m/s
The best time of year to visit San Ramon in the United States of America
During the months of April, May and October 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 and September are very dry.
July has an average maximum temperature of 30°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 14°C.
December tops the wettest month list with 111 mm of rainfall.
August is the driest month with 0 mm of precipitation.
May is the sunniest month with an average of 324 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.
