No matter the time of year, having layers is always wise. The weather in the Southwest is quite variable and being able to get cooler or warmer on the fly is a helpful strategy. We always recommend clothing and shoes that you are comfortable being active in, hats, and sunglasses. In the warmer months a sun shirt can help shield your body from direct sunlight. In the cooler months it is nice to have a lightweight puffy or outer layer to cozy up into if the weather turns chilly. Depending on the forecast a rain shell is always a wise choice.