Pack sun glasses! Light cotton clothes (shorts, T-shirts) for warm or hot days from spring to fall. Sweater/pullover and/or jacket for colder evenings/nights (not in summer though) and in winter. El Paso is surrounded by the Chihuahuan Desert, the easternmost section of the Basin and Range Region and lies at elevation of 3,740 ft (1,140 m) above sea level. Summers are hot (over 35C, 90F) but freeze is not seldom in winter. The best weather to visit El Paso is in March to May and in October-November in my opinion. Check climate by month:
Average Minimum Temperature
Average Maximum Temperature
Check weather forecast for El Paso now.
Toiletries and Medical Supplies: Good quality sun protection cosmetics with high UV filter, especially if your skin is as white as mine. Use them BEFORE or just after you leave your car.
Photo Equipment: El Paso is sunny most of the time. Take a polarizing filter to darken overly light sky (especially with clouds). Neutral density filter may be useful, too. Well, they need some practice to use them properly. More here
Camping/Beach/Outdoor Gear: Ice chest (it costs some $20-$35) with ice cubes and cold beverages inside for car trips :-).
Clothing/Shoes/Weather Gear: in summer,the temperature rises up to 38°C very easily;for the french community,there is a music record:8 jours à EL PASO of johnny hallyday and michel sardou, who both went there for this occasion;and michel sardou almost died because of the heat;he had to come back earlier.