CITY OF ST. HELENA by Amazon Stones

St. Helena (pronounced saint he-LEE-na) is a city in Napa County, California, United States. It is part of the Napa, California Metropolitan Statistical Area. Its area code 707. Its zip code is 94574. It is in the Pacific time zone. The population was 5,950 at the 2000 census.

Ellen White, co-founder of Seventh-day Adventism, had a home called "Elmshaven" near St. Helena, beginning in 1900. She died there in 1915 and the site is now a National Historic Landmark.

The St. Helena AVA is in the region.

The National Weather Service has a cooperative weather station in St. Helena. Winters are cool and wet, while summers have hot days and cool nights with little precipitation. Average January temperatures range from 56.8 °F (13.8 °C) to 36.4 °F (2.4 °C). Average July temperatures range from 89.8 °F (32.1 °C) to 52.7 °F (11.5 °C). There are an average of 55.7 days with highs of 90 °F (32 °C) or higher and an average of 34.7 days with lows of 32 °F (0 °C) or lower. The record high temperature was 115 °F (46 °C) on July 13, 1972, and the record low temperature was 11 °F (-12 °C) on December 11, 1932.

Average annual precipitation is 35.10 inches (892 mm). There are an average of 68 days with measurable precipitation. The wettest year was 1983 with 75.40 inches (1,915 mm) and the dryest year was 1976 with 10.41 inches (264 mm). The wettest month on record was February 1986 with 25.60 inches (650 mm). The most rainfall in 24 hours was 6.83 inches (173 mm) on January 21, 1967. Although snow rarely falls in St. Helena, there is an annual average snowfall of 0.2-inch (5.1 mm). The most snowfall in one month was 4.0 inches (100 mm), recorded in January 1974 and again in March 1976. The most snowfall in 24 hours was 4.0 inches (100 mm) on March 2, 1976.