Pack or skip
Sunscreen for Lucerne in June
Verdict
Pack it
Sun still finds you at 70°F — UV doesn't care about temperature.
Why
Lucerne in June averages highs of 70°F, lows of 53°F, 12 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 70°F — UV doesn't care about temperature.