Weather in Sunnyvale in December
Sunnyvale, United States averages a high of 14°C (57.2°F) and low of 6.7°C (44.1°F) in December, with 9 rain days and 7.3 hours of daily sunshine. Travel score: 63.6/100 (Good). The best time to visit Sunnyvale is July.
High
14°C57°F
Low
7°C44°F
🌧️
9
rain days
☀️
7.3
hrs/day sunshine
💧
78%
humidity
64— Good
December in Sunnyvale is cool and occasionally wet — good for most activities.
What are the average temperatures in Sunnyvale?
How much does it rain in Sunnyvale in December?
Sunnyvale receives an average of 116.6mm of rainfall across 9 rainy days in December. The annual total is 589.5mm.
What should I pack for Sunnyvale in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Warm coat
Cool weather with highs around 14°C
🧶
Sweaters and warm layers
Layer up for comfort
🎉Visiting United States in December?
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Data based on 1994–2024 averages · Last updated: 2024-12-31