Weather · December
San Ramon weather in December
Average highs of 58°F, lows of 38°F and 2.8 in of rain, from 30 years of weather records.
December is San Ramon’s 11th warmest month, with average highs of 58°F and lows of 38°F. That is 8° cooler than November, and 15° below the yearly average high.
- Average high
- 58°F
- Average low
- 38°F
- Precipitation
- 2.8 in
- Wet days
- 10
- Sunrise · sunset
- 7:15 AM · 4:49 PM
What to wear in December
- Cool days: a warm jacket and long pants, plus layers for the swing between morning and afternoon.
What December weather is good for
What’s on in San Ramon in December
Guides for this month: Christmas in San Ramon · New Year’s Eve in San Ramon.
- Bah Humbug! 5KSaturday, December 5 · Streets and Iron Horse Trail around Bishop Ranch (Alcosta Blvd., Norris Canyon Rd., Camino Ramon), San Ramon
- Impressions of the NutcrackerDecember 5 – December 6 · Dec. 5 at 7:30 p.m.; Dec. 6 at 1 and 3:30 p.m. · Dougherty Valley Performing Arts Center, San Ramon
- Pleasanton Hometown Holiday Parade and Tree LightingSaturday, December 5 · Parade 5 p.m.; tree lighting follows · Main Street, downtown Pleasanton
- The Three Billy Goats Gruff (Holiday Edition)Saturday, December 5 · 1-2:30 p.m. · Dougherty Station Library, San Ramon
- Holiday on the FarmSaturday, December 12 · 11 a.m.-2 p.m. · Forest Home Farms Historic Park, San Ramon
- Hoku & Mistletoe: A Polynesian Style HolidaySaturday, December 19 · 4 p.m. · Dougherty Valley Performing Arts Center, San Ramon
- Victorian Christmas Tours of the Glass HouseSaturday, December 19 · Tours at 10, 10:30, 11, 11:30 a.m. and noon · Glass House, Forest Home Farms Historic Park, San Ramon
- Noon Year's Eve Family Storytime at Danville LibrarySaturday, December 26 · 11-11:45 a.m. · Danville Library
See all upcoming events and school days off.
December compared with the months around it
Planning a trip? See the best time to visit San Ramon and today’s forecast.
Questions
How hot does it get in San Ramon in December?
Average highs are 58°F and average lows 38°F, for a daily mean of 48°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in San Ramon in December?
December averages 2.8 in of precipitation over about 10 days with at least 0.01 in. It is the 3rd wettest month of the year.
What time is sunset in San Ramon in December?
Around mid-December the sun rises about 7:15 AM and sets about 4:49 PM, for roughly 9.6 hours of daylight.
Is December a good time to visit San Ramon?
The mildest months for visiting are May, June, October. December is cool, with Christmas lights and New Year’s Eve events.
NOAA U.S. Climate Normals 1991–2020, Livermore Muni Ap station (7.9 mi from downtown). Sunrise and sunset are calculated for December 15 at the city’s coordinates.