Will I be cold?
Will I be cold in San Diego in August?
Verdict
No — No, comfortable.
Lows stay near 70°F — you won't be reaching for the puffer.
Day vs. night
Day
83°F
Hot
Prioritize shade, hydration, and a brim.
Night
70°F
Comfortable
Comfortable outside without an extra layer.
Why
San Diego in August averages highs of 83°F, lows of 70°F, 0 rainy days.
You can pack for the daytime temps and not worry about the evening dip.