San Ramon in December

Average high

11.5°C

Average low

6.1°C

Rainfall

—

— wet days

Comfort score

out of 100

December in San Ramon averages a daily high of 11.5°C with nights around 6.1°C. Generally workable, with some weather to plan around.

Across the year, the best time to visit San Ramon is April–October.

Based on LAS TRAMPAS CALIFORNIA, CA US (9.8km), 1995–2024. 26 years of December data.