San Ramon experiences a mild climate with temperatures gradually warming up as the year progresses. Winters are cool, with January being the coldest month averaging around 10°C, while springs bring moderate temperatures, peaking in April with an average of 14°C. Summers are warm to hot, with June and July seeing temperatures frequently reaching above 30°C, with averages of 20°C and 21°C respectively. Autumn is mild, with September being the warmest month outside of summer, averaging around 20°C before temperatures drop into winter's cooler range. Overall, San Ramon has a relatively consistent temperature range throughout the year, with minimal extreme variations in temperature.