Climate of California
Northwest California has rainy cool winters and dry summers with temperatures in the summers in the upper 60s to the upper 70s. The Central Valley has a semi-arid climate with temperatures in the winter sometimes at nights fall below 30 °F (-1.1 °C) and at daytime rises above 80 °F (26.7 °C) with summers being from 80 °F (26.7 °C) to 100 °F (38 °C) at day. The desert areas in southern California has a hot and very dry climate with precipitation in some areas below 5 inches (127 mm) a year. Temperatures are mild in southern California's desert in the winter and temps can range from 60°F (15.5 °C) to 80°F (26.7 °C) at daytime with nights being chilly with temperatures ranging from 35°F (1.7 °C) to 50°F (10 °C). Temperatures are usually very hot during the day in desert places like Needles, San Bernardino and Palm Springs in the summer with daytime temperatures being from 105°F (40.5 °C) to 120°F (48°C) sometimes reaching above 120 °F (48 °C) and with nights being from 75°F (23.9 °C) to 90°F (32.2 °C). The hottest place in the world is in the desert of California, Death Valley. Death Valley once had a temperature of 134 °F (56.7 °C) on July 10, 1913 although some meteorologists dispute this temperature reading.  The average annual temperature in Death Valley from 1981-2010 was 76.7 °F (24.8 °C) with an average July mean temperature of 101.8 °F (38.8 °C).