The Brief Phoenix saw a high of 87°F on Thursday. On Friday, temps are expected to warm up a few degrees, with mostly to partly sunny conditions. Cooler temperatures are expected this weekend. PHOENIX - Thursday was a beautiful day, starting cloudy at times, but ending with full sun. Today Temperatures were cooler across the state, with all of Arizona seeing normal or below average temperatures. Phoenix saw a high of 87 degrees, which is right on average.