Will I be cold?
Will I be cold in El Paso in December?
Verdict
Yes — Yes, cold.
Lows drop to 32°F on average — noticeably cold, especially after sundown. Big diurnal swing (25°F) — layers matter more than one warm coat.
Day vs. night
Day
57°F
Cool
Sweater weather with the option to add a light shell.
Night
32°F
Cold
Cold enough that a hat and gloves become mandatory.
Why
El Paso in December averages highs of 57°F, lows of 32°F, 3 rainy days.
Plan for real winter kit — an insulated coat, warm hat, and gloves rather than a light jacket.
The day-to-night temperature swing is 25°F, which is the real story here — the average number hides how different midday and midnight feel.