I have to vote with all you New Yorkers about the weather! I, too, lived in NY, a little town called Groton (not very far from Ithaca!) and moved to Phoenix, AZ area 16 years ago. I have yet to miss my snow shovel, stud tires, riding/push lawn mower, weed whacker, lawn rake and window brush/scrapper for the car.
BUT, I did visit out here in August to make sure I could handle the heat. So just remember that the worst hot and muggy day in NY is mild compared to the whole summer in TX and you will fall in love!
Good luck on your move.