Weather in Mission Viejo in December
Mission Viejo, United States averages a high of 17.8°C (64°F) and low of 8.7°C (47.7°F) in December, with 5 rain days and 8.5 hours of daily sunshine. Travel score: 78.7/100 (Good). The best time to visit Mission Viejo is August.
High
18°C64°F
Low
9°C48°F
🌧️
5
rain days
☀️
8.5
hrs/day sunshine
💧
70%
humidity
79— Good
December in Mission Viejo is mild and mostly dry — good for most activities.
What are the average temperatures in Mission Viejo?
How much does it rain in Mission Viejo in December?
Mission Viejo receives an average of 49.1mm of rainfall across 5 rainy days in December. The annual total is 321.8mm.
What should I pack for Mission Viejo in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 18°C
Recommended
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
Traveling to United States in December?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31