Pioneer is a city of approximately 1,100 people in California, United States. Located in the Pacific Time Zone at 38.4°N latitude.
In 2025, Pioneer recorded an average annual temperature of 56°F. The hottest temperatures reached 95°F in September; the coolest were 21°F in February. Total precipitation for the year was 42 inches, with the wettest month being February. Snowfall for the year totaled approximately 5 inches.
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