Will I be hot?
Will I be hot in Santa Fe in December?
Verdict
No — No, comfortable.
Highs cap at 43°F — no heat-management gear needed.
Day vs. night
Day
43°F
Cold
Direct sun feels cool at best; shade is jacket weather.
Night
19°F
Freezing
Deep freeze after sunset — every exposed step counts.
Why
Santa Fe in December averages highs of 43°F, lows of 19°F, 4 rainy days.
Temperature is comfortable across the day; pack for style and weather resistance, not heat management.