They both have their merits. I'm a Wisconsin native, but I've lived in Arizona for 11+ years now. The heat is not all that bad. Really. It depends on where you live, too. The lower areas (Phoenix, Yuma, Bullhead City, Lake Havasu City) can get scorching hot, I'll give you that. But Flagstaff is beautiful. It's like being in Wisconsin, honestly. I live in Kingman and it's routinely 10 degrees cooler than the lower elevation cities. Of the 365 days we have each year, most of the state gets at least 300 days of sunshine. It's only rainy twice a year--early spring (Febuary/March) and Monsoon season (tends to vary every year. July/August is most common.) Depending on where you live, the monsoons barely do anything. In Phoenix, they get drenched. But up at our place, the surrounding mountains tend to suck most of the rain up and instead of daily late-afternoon monsoon storms, we only get it in town when the humidity gets to (prepare yourselves) 30%!!! I'll also spot you the "run out of things to do fast" part of the state. Unless you live in Phoenix where there's plenty to do, you're pretty much left with doing stuff out of doors (hiking, camping, etc.) or just staying inside and bumming around the house. If you go outside, you learn to stay hydrated and prevent sunburn. It's quite nice knowing that most people never see tarantulas or snakes in town--only in the desert wilderness. Mosquitoes and other biting/stinging insects are next to non-existent. And allergies and breathing ailments are much better to control here. On the other hands, Wisconsin has better defined seasons than Arizona, with greatly varied weather patterns. And to find things to do is a lot easier in Wisconsin because towns and cities are so much closer together but there remains plenty of "wilderness." In summary, it is very difficult for me to decide which I like best. The wife and I would love to move back to Wisconsin but at the same time, we have things so well off here. We have learned to adapt to the desert lifestyle and would probably have a shock to our systems by moving back and dealing with high humidity, and tornadoes, and winter storms, and hay fever, and mosquitos. We would love to move back if we had the opportunity and the means to do it, though. Once Wisconsin is in your blood, you can never truly get rid of it.