I think you are asking for the summer vacation dates for the public schools. I am a California teacher and our breaks do not all start and end at the same time. Summer breaks can start beginning the first week of June and don't end until late August. Most of our schools have a 9 week summer break. I have gone in early June and it was not too bad because most of the schools get out more mid-June. We always see Arizona license plates so they must start summer breaks earlier. The worst week will be over the 4th of July week, our Independence day. The weather will be cooler the earlier you go. June can be a little unpredictable for weather (overcast in the early AM). Late July and August will be hot. I hope this information helps.