Average Weather in Big Bear Lake California, United States
In Big Bear Lake, the summers are warm, arid, and mostly clear and the winters are very cold, dry, and partly cloudy. Over the course of the year, the temperature typically varies from 22°F to 81°F and is rarely below 14°F or above 88°F.
Based on the tourism score, the best time of year to visit Big Bear Lake for warm-weather activities is from late June to early September.
The warm season lasts for 3.3 months, from June 9 to September 20, with an average daily high temperature above 74°F. The hottest day of the year is July 27, with an average high of 81°F and low of 54°F.
The cold season lasts for 3.4 months, from November 21 to March 1, with an average daily high temperature below 51°F. The coldest day of the year is December 25, with an average low of 22°F and high of 43°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
Candelario, Spain (5,680 miles away); Altınyayla, Turkey (7,070 miles); and Gümüşhacıköy, Turkey (6,960 miles) are the far-away foreign places with temperatures most similar to Big Bear Lake (view comparison).
In Big Bear Lake, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Big Bear Lake begins around April 22 and lasts for 6.5 months, ending around November 6. On September 7, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 89% of the time, and overcast or mostly cloudy 11% of the time.
The cloudier part of the year begins around November 6 and lasts for 5.5 months, ending around April 22. On February 21, the cloudiest day of the year, the sky is overcast or mostly cloudy 46% of the time, and clear, mostly clear, or partly cloudy 54% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Big Bear Lake varies throughout the year.
The wetter season lasts 4.2 months, from November 22 to March 27, with a greater than 8% chance of a given day being a wet day. The chance of a wet day peaks at 15% on February 21.
The drier season lasts 7.8 months, from March 27 to November 22. The smallest chance of a wet day is 1% on June 13.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Big Bear Lake changes throughout the year.
Rain alone is the most common for 9.6 months, from February 21 to December 11. The highest chance of a day with rain alone is 7% on August 21.
Mixed snow and rain is the most common for 2.4 months, from December 11 to February 21. The highest chance of a day with mixed snow and rain is 6% on February 11.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Big Bear Lake experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 3.0 months, from December 19 to March 21, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around February 20, with an average total accumulation of 1.0 inches.
The rainless period of the year lasts for 9.0 months, from March 21 to December 19. The least rain falls around June 12, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Big Bear Lake experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.8 months, from November 11 to April 5, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 4, with an average total liquid-equivalent accumulation of 0.7 inches.
The snowless period of the year lasts for 7.2 months, from April 5 to November 11. The least snow falls around August 5, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Big Bear Lake varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 52 minutes of daylight; the longest day is June 20, with 14 hours, 27 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:35 AM on June 12, and the latest sunrise is 1 hour, 37 minutes later at 7:12 AM on November 6. The earliest sunset is at 4:37 PM on December 5, and the latest sunset is 3 hours, 26 minutes later at 8:03 PM on June 28.
Daylight saving time (DST) is observed in Big Bear Lake during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases
The perceived humidity level in Big Bear Lake, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Big Bear Lake experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from February 4 to July 10, with average wind speeds of more than 7.5 miles per hour. The windiest day of the year is April 26, with an average hourly wind speed of 8.7 miles per hour.
The calmer time of year lasts for 6.8 months, from July 10 to February 4. The calmest day of the year is September 8, with an average hourly wind speed of 6.2 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Big Bear Lake varies throughout the year.
The wind is most often from the west for 9.5 months, from February 4 to November 18, with a peak percentage of 78% on June 5. The wind is most often from the north for 2.5 months, from November 18 to February 4, with a peak percentage of 41% on January 1.
Big Bear Lake is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.2 months, from July 5 to October 11, with an average temperature above 67°F. The day of the year with the warmest water is August 24, with an average temperature of 69°F.
The time of year with cooler water lasts for 4.5 months, from December 9 to April 25, with an average temperature below 61°F. The day of the year with the coolest water is February 6, with an average temperature of 59°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Big Bear Lake throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Big Bear Lake for general outdoor tourist activities is from late June to early September, with a peak score in the last week of July.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Big Bear Lake for hot-weather activities is from late June to late August, with a peak score in the last week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Big Bear Lake typically lasts for 5.2 months (160 days), from around May 12 to around October 19, rarely starting before April 18 or after June 7, and rarely ending before September 29 or after November 8.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Big Bear Lake should appear around April 15, only rarely appearing before March 26 or after May 4.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.5 months, from April 24 to August 8, with an average daily incident shortwave energy per square meter above 7.6 kWh. The brightest day of the year is June 18, with an average of 8.8 kWh.
The darker period of the year lasts for 3.2 months, from November 6 to February 11, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is December 22, with an average of 3.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Big Bear Lake are 34.244 deg latitude, -116.911 deg longitude, and 6,749 ft elevation.
The topography within 2 miles of Big Bear Lake contains very significant variations in elevation, with a maximum elevation change of 1,421 feet and an average elevation above sea level of 7,001 feet. Within 10 miles contains very significant variations in elevation (7,831 feet). Within 50 miles also contains extreme variations in elevation (11,447 feet).
The area within 2 miles of Big Bear Lake is covered by trees (63%), shrubs (18%), and water (18%), within 10 miles by trees (52%) and shrubs (45%), and within 50 miles by shrubs (79%).
This report illustrates the typical weather in Big Bear Lake, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Big Bear Lake.
For each station, the records are corrected for the elevation difference between that station and Big Bear Lake according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Big Bear Lake is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Big Bear Lake and a given station.
The stations contributing to this reconstruction are: San Bernardino International Airport (18%, 34 kilometers, southwest); Southern California Logistics Airport (27%, 57 kilometers, northwest); Palm Springs International Airport (14%, 60 kilometers, southeast); Twenty-Nine Palms, Marine Corps Air-Ground Combat Center (21%, 69 kilometers, east); and Barstow Daggett County Airport (20%, 69 kilometers, north).
Time zones for airports and weather stations are provided by AskGeo.com .