Pack or skip
Sunscreen for Fresno in September
Verdict
Pack it
Sun still finds you at 93°F — UV doesn't care about temperature.
Why
Fresno in September averages highs of 93°F, lows of 63°F, 1 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 93°F — UV doesn't care about temperature.