With a population of around 6,900, Alta Sierra sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Alta Sierra recorded an average annual temperature of 59°F — about 7.0°F above the 30-year normal of 52°F. The hottest day reached 98°F in August; the coldest was 25°F in February. Total precipitation was 54 inches (drier than usual). The wettest month was February.
View current conditions and forecast for Alta Sierra · More cities in California