Winters in San Tan Valley are mild, with temperatures rarely dropping below freezing and averaging around 12°C in January. As spring approaches, temperatures gradually warm up, reaching averages of 24°C by April and peaking at 28°C in May. Summer months bring hot temperatures, with June and July often seeing highs above 40°C, but averages remain steady around 33-34°C throughout the season. Autumn brings relief from the heat, with temperatures cooling down to averages around 23°C by October, before gradually dropping again in November and December.