Pack or skip
Umbrella for San Jose in September
Verdict
Skip it
Only about 1 rainy days on average — you can risk it.
Why
San Jose in September averages highs of 84°F, lows of 59°F, 1 rainy days.
That climate means an umbrella isn't pulling its weight. Only about 1 rainy days on average — you can risk it.
What to bring instead
Consider rain jacket instead →
See the pack-or-skip verdict for rain jacket in San Jose in September.