This chart indicates the average hottest and coolest weather within a 24-hour period, averaged over the month. The Sonoran Desert region has two distinct rainy seasons. One falls from mid December through mid February and typically involves slow moving systems that will bring rain and clouds for a day and a half to three days. The other rainy season is in July and August, when thunderstorms appear two or three afternoons a week. April through June is the driest time of the year, although two or three days a month may be partially lost due to winds.
Humidity is very low year round.