Pack or skip
Sunscreen for Lucerne in July
Verdict
Pack it
Sun still finds you at 74°F — UV doesn't care about temperature.
Why
Lucerne in July averages highs of 74°F, lows of 56°F, 12 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 74°F — UV doesn't care about temperature.