It was 110 degrees, officially, in Phoenix, Arizona today. Mind you, this is the temperature at the airport. I drove by a business with a clock/thermometer today at thought it said 112 degrees. 110, 112... it's still hot as hell.
All this heat makes for a rough time concealing your weapons. The standard dress here during the summer is shorts and a t-shirt. With all this heat, that loose fitting shirt you started with when you walked out the front door is sticking to your body within moments. Soooo, where do you hide a pistol?
This is where it gets tough. You cannot wear a fanny pack--that's a dead giveaway. You cannot wear a thick holster as it sticks out. Summertime in Arizona is time for smaller guns. Put away the 1911's, larger Glocks, and other mid to full sized guns. Out come the compacts, subcompacts, and snubbies. Thin and high-rise holsters are the usual. Some people just drop these smaller, lighter guns into their pant pockets. While I have done this in the past, I worries about lint and other crap i accumulate in my pocket ending up harming the function of my weapon at a time when I might need it most.
Personally, I carry a Taurus Millennium or Subcompact Springfield xD, both in 9mm, into a tiny, neoprene Mikes Sidekick holder that fits perfectly into my pocket.