Average Weather For South Lake Tahoe, California, USA

Location

This report describes the typical weather at the Lake Tahoe Airport (South Lake Tahoe, California, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.

South Lake Tahoe, California has a continental climate with dry warm summers. The area within 25 mi of this station is covered by forests (62%), shrublands (15%), grasslands (11%), and lakes and rivers (10%).

Temperature

Over the course of a year, the temperature typically varies from 18°F to 80°F and is rarely below 5°F or above 86°F.

Daily High and Low Temperature

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The warm season lasts from June 19 to September 15 with an average daily high temperature above 72°F. The hottest day of the year is August 2, with an average high of 80°F and low of 47°F.

The cold season lasts from November 16 to April 1 with an average daily high temperature below 48°F. The coldest day of the year is December 24, with an average low of 18°F and high of 40°F.

Fraction of Time Spent in Various Temperature Bands

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:26 hours of daylight; the longest day is June 20 with 14:55 hours of daylight.

Daily Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

The earliest sunrise is at 5:34am on June 16 and the latest sunset is at 8:30pm on June 24. The latest sunrise is at 7:30am on November 3 and the earliest sunset is at 4:37pm on December 7.

Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.

Daily Sunrise & Sunset with Twilight and Daylight Savings Time

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight savings time are indicated by the "DST" labels.

Clouds

The median cloud cover ranges from 2% (clear) to 55% (partly cloudy). The sky is cloudiest on February 20 and clearest on July 30. The clearer part of the year begins around May 19. The cloudier part of the year begins around November 14.

Median Cloud Cover

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

On July 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 60% of the time, and overcast or mostly cloudy 10% of the time.

On February 20, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 42% of the time, and clear or mostly clear 29% of the time.

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around March 7, occurring in 42% of days. Precipitation is least likely around August 29, occurring in 13% of days.

Probability of Precipitation at Some Point in the Day

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

Over the entire year, the most common forms of precipitation are light snow, light rain, moderate snow, thunderstorms, and heavy snow.

Light snow is the most severe precipitation observed during 40% of those days with precipitation. It is most likely around February 21, when it is observed during 21% of all days.

Light rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around October 23, when it is observed during 6% of all days.

Moderate snow is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around February 25, when it is observed during 9% of all days.

Thunderstorms are the most severe precipitation observed during 13% of those days with precipitation. They are most likely around July 23, when it is observed during 10% of all days.

Heavy snow is the most severe precipitation observed during 11% of those days with precipitation. It is most likely around March 8, when it is observed during 7% of all days.

Types of Precipitation Throughout the Year

Relative frequency of various types of precipitation over the course of a typical year.

During the warm season, which lasts from June 19 to September 15, there is a 14% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (62% of days with precipitation have at worst thunderstorms), light rain (26%), and moderate rain (5%).

During the cold season, which lasts from November 16 to April 1, there is a 38% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light snow (50% of days with precipitation have at worst light snow), moderate snow (20%), heavy snow (16%), and light rain (9%).

Warm Season Precipitation

Cold Season Precipitation

Relative frequency of various types of precipitation during the warm and cold seasons respectively.

Snow

The likelihood of snow falling is highest around February 22, occurring in 37% of days. The season in which it is relatively likely for snow to fall spans from October 27 to May 18.

Probability of Snow Fall Being Reported in a Given Day

Probability that snow will be reported at least once in a given day. The season is defined as the period during which the probability is greater than one third the maximum probability.

Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.

Humidity

The relative humidity typically ranges from 23% (dry) to 94% (very humid) over the course of the year, rarely dropping below 14% (very dry) and reaching as high as 100% (very humid).

The air is driest around August 3, at which time the relative humidity drops below 28% (dry) three days out of four; it is most humid around December 14, exceeding 91% (very humid) three days out of four.

Relative Humidity

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.

Over the course of a year, the dew point typically varies from 12°F (dry) to 47°F (dry) and is rarely below -1°F (dry) or above 57°F (comfortable).

Dew Point

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

Over the course of the year typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 23 mph (fresh breeze).

The highest average wind speed of 7 mph (light breeze) occurs around April 1, at which time the average daily maximum wind speed is 14 mph (moderate breeze).

The lowest average wind speed of 5 mph (light breeze) occurs around October 4, at which time the average daily maximum wind speed is 12 mph (gentle breeze).

Wind Speed

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the south (22% of the time). The wind is least often out of the east (1% of the time), west (1% of the time), north west (2% of the time), south east (2% of the time), and north east (3% of the time).

Wind Directions Over the Entire Year

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.