Big Bear Lake Weather in December
December in Big Bear Lake averages 9°C (48°F) during the day and -6°C (21°F) at night. It is the wettest month of the year, with 136 mm (5.4 in) of snow/rainfall on average, so waterproof gear is a must.
Rainfall in Big Bear Lake in December
Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. Looking at the last 30 years, the data shows about 8 days with snow/rain, averaging 136 mm (5.4 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Big Bear Lake in December
Daytime temperatures in Big Bear Lake reach 9°C (48°F) in December, dropping to -6°C (21°F) at night. Winter occurs in December. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. At -6°C (21°F) overnight, frost and ice are likely outside. Indoors, consider packing an extra blanket if you're unsure about the heating. On average, it is the coldest month of the year. So be prepared and make sure to pack winter clothes.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Big Bear Lake. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Big Bear Lake's climate page.
Big Bear Lake Temperature in December
Min Temperature
-6°C (21°F)
Max Temperature
9°C (48°F)
Chance of Rain
27%
Precipitation
136 mm (5.4 in)
Rainy days
8 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Big Bear Lake typically stay consistent throughout December, with daily highs averaging around 9°C (48°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 3°C (37°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Big Bear Lake in December
Browse day-by-day weather records for Big Bear Lake spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Big Bear Lake historical weather extremes in December
Based on weather observations in Big Bear Lake between 1976 and 2025, these are the recorded extremes during December.
- The coldest night in December in Big Bear Lake was on December 25, 2016, with a minimum of -16°C (3°F).
- The heaviest December precipitation occurred on December 22, 2010, when 52 mm (2 in) of precipitation fell.
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Big Bear Lake in December
We recommend to layer up for chilly conditions in Big Bear Lake in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.What To Do in Big Bear Lake in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Big Bear Lake's climate page.
See the full Big Bear Lake climate overview or explore weather in the United States of America.
