Weather in Rancho Cucamonga in December
Rancho Cucamonga, United States averages a high of 17°C (62.6°F) and low of 6°C (42.8°F) in December, with 6 rain days and 8.4 hours of daily sunshine. Travel score: 78/100 (Good). The best time to visit Rancho Cucamonga is August.
High
17°C63°F
Low
6°C43°F
🌧️
6
rain days
☀️
8.4
hrs/day sunshine
💧
59%
humidity
78— Good
December in Rancho Cucamonga is mild and mostly dry — good for most activities.
What are the average temperatures in Rancho Cucamonga?
How much does it rain in Rancho Cucamonga in December?
Rancho Cucamonga receives an average of 67mm of rainfall across 6 rainy days in December. The annual total is 427.9mm.
What should I pack for Rancho Cucamonga in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 17°C
Recommended
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
🎉Visiting United States in December?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31