With a population of around 175,000, Rancho Cucamonga sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Rancho Cucamonga recorded an average annual temperature of 65°F. The hottest temperatures reached 103°F in August; the coolest were 38°F in January. Total precipitation for the year was 24 inches, with the wettest month being November.
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