Pack or skip
Umbrella for San Francisco in December
Verdict
Pack it
Around 11 rainy days across the month — an umbrella earns its space.
Why
San Francisco in December averages highs of 57°F, lows of 46°F, 11 rainy days.
That climate means an umbrella earns its space in the bag. Around 11 rainy days across the month — an umbrella earns its space.