Pack or skip
Sunscreen for Knoxville in May
Verdict
Pack it
Sun still finds you at 79°F — UV doesn't care about temperature.
Why
Knoxville in May averages highs of 79°F, lows of 56°F, 11 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 79°F — UV doesn't care about temperature.