Johnstonville is a city of approximately 1,000 people in California, United States. Located in the Pacific Time Zone at 40.4°N latitude.
In 2025, Johnstonville recorded an average annual temperature of 53°F. The hottest temperatures reached 102°F in July; the coolest were 2°F in February. Total precipitation for the year was 29 inches, with the wettest month being February. Snowfall for the year totaled approximately 23 inches.
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