Pack or skip
Sunscreen for Tucson in May
Verdict
Pack it
Sun still finds you at 91°F — UV doesn't care about temperature.
Why
Tucson in May averages highs of 91°F, lows of 61°F, 2 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 91°F — UV doesn't care about temperature.