4. Carry a Jacket
The mid-day weather tends to be mild and is perfectly fine for wearing a short-sleeve shirt in. However, in the early morning and after sundown, it can drop to a point where you'll definitely be feeling the chill if you come unprepared. We recommend carrying at least a lightweight windbreaker in your bag—something that can ward off the wind chill when needed but packs down to about the size of your fist when you're not wearing it.
If you need slightly more warmth, bring a lightweight sweater and a hat along too.