We will be in Guadalajara, Tlaquepaque and Tonala in August. Would like to know what is the appropriate clothing for my nephew that is 21 years old. We are going to be staying at a very nice hotel in Guad. and would like to experience 2 nice dinners. Possibly also go to Santo Coyote Cantina one night. What would be the best clothing for him to bring? And how casual can we dress while we are out walking around shopping? We will also be taking a city tour, shopping in Tlaquepaque and Tonala. Also what are the temperatures like in August for the Guadalajara area. Coming from Texas and Puerto Vallarta so we can easily take the heat and humidity. Thanks for your help.