Will I be hot?
Will I be hot in Anaheim in December?
Verdict
No — No, comfortable.
Highs cap at 69°F — no heat-management gear needed.
Day vs. night
Day
69°F
Comfortable
A T-shirt and a light overshirt is enough.
Night
48°F
Cool
You'll want a warm layer after sunset — not a heavy coat.
Why
Anaheim in December averages highs of 69°F, lows of 48°F, 4 rainy days.
Temperature is comfortable across the day; pack for style and weather resistance, not heat management.