Weather in South San Francisco in December
South San Francisco, United States averages a high of 13.5°C (56.3°F) and low of 7.9°C (46.2°F) in December, with 9 rain days and 6.9 hours of daily sunshine. Travel score: 61.9/100 (Good). The best time to visit South San Francisco is September.
High
14°C56°F
Low
8°C46°F
🌧️
9
rain days
☀️
6.9
hrs/day sunshine
💧
82%
humidity
62— Good
December in South San Francisco is cool and occasionally wet — good for most activities.
What are the average temperatures in South San Francisco?
How much does it rain in South San Francisco in December?
South San Francisco receives an average of 100.8mm of rainfall across 9 rainy days in December. The annual total is 491.2mm.
What should I pack for South San Francisco 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?
Don't miss any public holidays — check before you book!
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What is the weather like in other months in South San Francisco?
Data based on 1994–2024 averages · Last updated: 2024-12-31