How bad is Arizona heat in summer, honestly?+
In the low desert it is the main character. Phoenix regularly passes a hundred and ten Fahrenheit for weeks, pavement burns bare feet, and outdoor walking is limited to the hour after sunrise. People do live and retreat here in July, but everything happens indoors or at night. If your week is built around being outside, either come between November and April or go up to the pine country instead.
Can one trip cover both desert and mountains?+
Easily, and it is the smartest way to use this state. Flagstaff sits at around seven thousand feet and is roughly two hours north of Phoenix, so you can move from cactus to snowbound pine in a single morning. The catch is altitude and a twenty five degree temperature difference, so pack for both climates in the same bag.
What is monsoon season and does it ruin a trip?+
From roughly early July to mid September, moist air builds over hot afternoons and breaks into short violent thunderstorms. Mornings usually stay clear and the storms are spectacular from a porch. The danger is flash flooding in dry washes and slot canyons, which can fill from rain falling miles away. Never camp in a wash, and check the forecast before any canyon walk.