Pack or skip
Sunscreen for Tucson in June
Verdict
Pack it
Sun still finds you at 100°F — UV doesn't care about temperature.
Why
Tucson in June averages highs of 100°F, lows of 70°F, 3 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 100°F — UV doesn't care about temperature.