March - May, late September - November
At about 4,500 feet, Sedona is blessed with four moderate seasons. Visitors—some four million of them—flock to the scenic burg year-round, but especially in spring and fall. Weather tends to be idyllic, with mild daytime temperatures ranging from 65 to 80 degrees and cool nights. No matter what time of year, expect temperature fluctuations of 30 degrees or more between daytime highs and nighttime lows. You should book not only hotel reservations well in advance but also try to schedule spa treatments and tours ahead of time. Since so much recreational area surrounds Sedona, the throngs are more dispersed than at many other bustling vacation destinations. It may not seem so crowded—at least until you drive to dinner at the exact same time as everyone else.
January - February
The first two weeks of December could also be included, but things get hectic closer to the holidays as Phoenix residents head to the high country for a little taste of winter. Temperatures normally climb into the 50s on most winter days, but you will be glad you packed a coat for chilly nights. Storms are always possible. That usually means rain in Sedona, with snow dusting the higher formations, a lovely sight. Snow occasionally falls in Sedona proper but melts away by midday. Weather conditions sometimes lead to the closure of the upper portion of Oak Creek Canyon. The nearest skiing is at Snowbowl in Flagstaff.
June - September
In many ways this is the best time of year to go, especially if you can book during the week. Deals are available across the board from hotels to restaurants to tours. Temperatures will climb into the mid-90s or higher, but again, they cool off dramatically as the sun goes down, so mornings and evenings are quite comfortable. Searching for swimming holes or just a shady spot in the woods is not the worst way to spend a hot summer day. Weekends will see hordes of Phoenix folk on a quest for those same swimming holes. Monsoon season erupts July through August, which means sudden, fast-moving storms in the afternoons. It also means astonishing skies of bruised thunderheads leading to even more lavish sunsets, and occasionally waterfalls tumbling down the red rocks.