Yosemite Valley, California

Yosemite has a Mediterranean climate (Köppen climate classification Csa), meaning most precipitation falls during the mild winter, and the other seasons are nearly dry (less than three percent of precipitation falls during the long, hot summers). Because of orographic lift, precipitation increases with elevation up to 8,000 feet (2,400 m) where it slowly decreases to the crest. Precipitation amounts vary from 36 inches (910 mm) at 4,000 feet (1,200 m) elevation to 50 inches (1,300 mm) at 8,600 feet (2,600 m). Snow does not typically persist on the ground until November in the high country. It accumulates all winter and into March or early April.[6]

Mean daily temperatures range from 25 °F (−4 °C) to 53 °F (12 °C) at Tuolumne Meadows at 8,600 feet (2,600 m). At the Wawona Entrance (elevation 5,130 feet or 1,560 metres), mean daily temperature ranges from 36 to 67 °F (2 to 19 °C). At the lower elevations below 5,000 feet (1,500 m), temperatures are hotter; the mean daily high temperature at Yosemite Valley (elevation 3,966 feet or 1,209 metres) varies from 46 to 90 °F (8 to 32 °C). At elevations above 8,000 feet (2,400 m), the hot, dry summer temperatures are moderated by frequent summer thunderstorms, along with snow that can persist into July. The combination of dry vegetation, low relative humidity, and thunderstorms results in frequent lightning-caused fires as well.[6]

At the park headquarters, with an elevation of 4,018 feet (1,225 m), January averages 38.0 °F (3.3 °C), while July averages 73.3 °F (22.9 °C), though in summer the nights are much cooler than the hot days. There are an average of 45.5 days with highs of 90 °F (32 °C) or higher and an average of 105.6 nights with freezing temperatures. Freezing temperatures have been recorded in every month of the year. The record high temperature was 112 °F (44 °C) on July 22 and July 24, 1915, while the record low temperature was −7 °F (−22 °C) on January 1, 2009. Average annual precipitation is nearly 37 inches (940 mm), falling on 67 days. The wettest year was 1983 with 66.06 inches (1,678 mm) and the driest year was 1976 with 14.84 inches (377 mm). The most precipitation in one month was 29.61 inches (752 mm) in December 1955 and the most in one day was 6.92 inches (176 mm) on December 23, 1955. Average annual snowfall is 39.4 inches (1.00 m). The snowiest winter was 1948–1949 with 176.5 inches (4.48 m). The most snow in one month was 175.0 inches (4.45 m) in January 1993.

At the 2010 census Yosemite Valley had a population of 1,035. The population density was 488.1 inhabitants per square mile (188.5/km²). The racial makeup of Yosemite Valley was 831 (80.3%) White, 28 (2.7%) African American, 31 (3.0%) Native American, 31 (3.0%) Asian, 7 (0.7%) Pacific Islander, 70 (6.8%) from other races, and 37 (3.6%) from two or more races. Hispanic or Latino of any race were 123 people (11.9%).[11]

The census reported that 511 people (49.4% of the population) lived in households, 524 (50.6%) lived in non-institutionalized group quarters, and no one was institutionalized.

There were 282 households, 44 (15.6%) had children under the age of 18 living in them, 74 (26.2%) were opposite-sex married couples living together, 6 (2.1%) had a female householder with no husband present, 6 (2.1%) had a male householder with no wife present. There were 21 (7.4%) unmarried opposite-sex partnerships, and 3 (1.1%) same-sex married couples or partnerships. 127 households (45.0%) were one person and 12 (4.3%) had someone living alone who was 65 or older. The average household size was 1.81. There were 86 families (30.5% of households); the average family size was 2.84.

The age distribution was 81 people (7.8%) under the age of 18, 140 people (13.5%) aged 18 to 24, 413 people (39.9%) aged 25 to 44, 378 people (36.5%) aged 45 to 64, and 23 people (2.2%) who were 65 or older. The median age was 37.6 years. For every 100 females, there were 148.8 males. For every 100 females age 18 and over, there were 157.1 males.

There were 323 housing units at an average density of 152.3 per square mile, of the occupied units 2 (0.7%) were owner-occupied and 280 (99.3%) were rented. The homeowner vacancy rate was 0%; the rental vacancy rate was 1.8%. 3 people (0.3% of the population) lived in owner-occupied housing units and 508 people (49.1%) lived in rental housing units.

At the 2000 census there were 265 people, 104 households, and 50 families residing in the community. The population density was 125.6 inhabitants per square mile (48.5/km²). There were 123 housing units at an average density of 58.3 per square mile (22.5/km²). The racial makeup of the community was 87.92% White, 0.75% African American, 2.26% Native American, 1.13% Asian, 4.91% from other races, and 3.02% from two or more races. Hispanic or Latino of any race were 15.09%.[12]

Of the 104 households, 27.9% had children under the age of 18 living with them, 43.3% were married couples living together, 2.9% had a female householder with no husband present, and 51.0% were non-families. 44.2% of households were one person, and 1.0% were one person aged 65 or older. The average household size was 2.02 and the average family size was 2.90.

In the community the population was spread out, with 20.0% under the age of 18, 7.2% from 18 to 24, 50.9% from 25 to 44, 20.0% from 45 to 64, and 1.9% 65 or older. The median age was 36 years. For every 100 females, there were 173.2 males. For every 100 females age 18 and over, there were 178.9 males.

The median household income was $58,393 and the median family income was $61,750. Males had a median income of $48,542 versus $24,524 for females. The per capita income for the community was $28,414. None of the population or families were below the poverty line.