I've been trying for six years now, and I have not yet been able to grow a tomato in Henderson, Nevada. This week I checked on the internet and found out that tomatoes don't like temperatures colder than 53 deg. F or hotter than 95 deg. F. That means the only time tomatoes would be happy here would be for about one day in April and then maybe one week in September.
So, even though it is nowhere near freezing at night yet, I go out and cover up my tomatoes every evening. They seem to be enjoying it. In fact, I think some of them are getting ripe, even though it is already the middle of November.