Pack or skip
Sunglasses for San Francisco in September
Verdict
Pack it
Highs around 70°F — plenty of daylight glare.
Why
San Francisco in September averages highs of 70°F, lows of 57°F, 2 rainy days.
That climate means sunglasses earns its space in the bag. Highs around 70°F — plenty of daylight glare.