It can be cool to cold. You're going to need long pants and a sweater at night. Daytime is ok for shorts & tees unless it's cloudy & overcast, and then you might feel more comfortable in a sweater.

I'm from NJ, and agree, we are used to cold weather, but we're not used to changing CLIMATES in a matter of minutes.

As an extreme, we were at sea level in our bathing suits. We went to the top of Mauna Kea and had on parkas & gloves. Yes, that's an extreme, but consider that you can easily go from sea level to 3000 feet in 10 minutes. It's definitely cooler up there.

Bring pants & a sweater. You'll be glad you did.

Mary