Pack or skip
Sunscreen for Tucson in July
Verdict
Pack it
Sun still finds you at 99°F — UV doesn't care about temperature.
Why
Tucson in July averages highs of 99°F, lows of 74°F, 9 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 99°F — UV doesn't care about temperature.