Pack or skip
Sunglasses for Lisbon in December
Verdict
Pack it
Highs around 59°F — plenty of daylight glare.
Why
Lisbon in December averages highs of 59°F, lows of 48°F, 12 rainy days.
That climate means sunglasses earns its space in the bag. Highs around 59°F — plenty of daylight glare.