Summers are warm to hot, with June being the hottest month, with an average high of and a low of . Most of the precipitation falls during the summer months, when the monsoon moves northward, causing moist air from the Gulf of California and the Gulf of Mexico to move into the area, leading to many days with precipitation. Generally, this usually occurs around mid-June. Afternoon storms are common in the summer, and they can be accompanied by hail or thunderstorms. July and August have warm temperatures, averaging though slightly cooler due to the presence of the rain. Humidity tends to be higher during the summer months, averaging 60% from June to September. The months of March–April and October–November are transitional months with warm temperatures during the day and cool temperatures during the night with occasional precipitation.