Pack or skip
Umbrella for San Jose in December
Verdict
Pack it
Around 8 rainy days across the month — an umbrella earns its space.
Why
San Jose in December averages highs of 57°F, lows of 41°F, 8 rainy days.
That climate means an umbrella earns its space in the bag. Around 8 rainy days across the month — an umbrella earns its space.