Weather · December
San Bernardino weather in December
Average highs of 67°F, lows of 40°F and 2.0 in of rain, from 30 years of weather records.
December is San Bernardino’s coldest month, with average highs of 67°F and lows of 40°F. That is 8° cooler than November, and 13° below the yearly average high.
- Average high
- 67°F
- Average low
- 40°F
- Precipitation
- 2.0 in
- Wet days
- 6
- Sunrise · sunset
- 6:47 AM · 4:41 PM
What to wear in December
- Mild days: dress in layers, with a light jacket or sweater for mornings and evenings.
What December weather is good for
What’s on in San Bernardino in December
Guides for this month: Christmas in San Bernardino · New Year’s Eve in San Bernardino.
- Redlands Christmas ParadeSaturday, December 5 · 6:00 p.m. · State Street, Historic Downtown Redlands
- Rialto Holiday Festival & ParadeSaturday, December 5 · 5:30-9:30 p.m. · Rialto, next to San Bernardino's west side
- Santa & Mrs. Claus at the LibraryMonday, December 7 · 5:00-7:00 p.m. · Feldheym Central Library, downtown San Bernardino
- San Bernardino Symphony: A Christmas FestivalSaturday, December 12 · 3:00 p.m. · California Theatre of the Performing Arts, downtown San Bernardino
- New Year's Eve Celebration at the Villaseñor LibraryMonday, December 28 · 5:00-6:00 p.m. · Villaseñor Branch Library, west San Bernardino
- Countdown NYEDecember 31 – January 1 · NOS Events Center, San Bernardino
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 Bernardino and today’s forecast.
Questions
How hot does it get in San Bernardino in December?
Average highs are 67°F and average lows 40°F, for a daily mean of 53°F. Individual days run hotter or colder than these 30-year averages.
Does it rain in San Bernardino in December?
December averages 2.0 in of precipitation over about 6 days with at least 0.01 in. It is the 4th wettest month of the year.
What time is sunset in San Bernardino in December?
Around mid-December the sun rises about 6:47 AM and sets about 4:41 PM, for roughly 9.9 hours of daylight.
Is December a good time to visit San Bernardino?
The mildest months for visiting are April, May, October. December is mild, with Christmas lights and New Year’s Eve events.
NOAA U.S. Climate Normals 1991–2020, Redlands station (7.3 mi from downtown). Sunrise and sunset are calculated for December 15 at the city’s coordinates.