Located in the southwestern part of the United States and with a Saguaro (cactus) as the official state flower, it's no surprise that Arizona can reach temperatures of up to 45°C during summer. Yes, you read that right. In fact, the hottest day on record in Arizona was June 29th, 1994 when the temperature reached a staggeringly high 53°C. Thankfully, the average temperature in summer is much lower (albeit still very hot), sitting in the mid-30s°C.
But, just because it's hot, doesn't mean Arizona doesn't experience rainfall during summer from time to time. While the state enjoys roughly around 330 days of sunshine per year, the months of June, July, and August do see rainfall for an average of 3 days per month. However, this is usually only around 0.3 inches per day, so it won't stop you from enjoying time outside to explore the state's beautiful landscapes.