Will I be cold?
Will I be cold in Seattle in August?
Verdict
No — No, comfortable.
Lows stay near 57°F — you won't be reaching for the puffer.
Day vs. night
Day
76°F
Warm
Breathable fabrics; sunscreen matters more than a jacket.
Night
57°F
Cool
You'll want a warm layer after sunset — not a heavy coat.
Why
Seattle in August averages highs of 76°F, lows of 57°F, 5 rainy days.
You can pack for the daytime temps and not worry about the evening dip.