Tucson Monsoon season usually begins around the 4th of July and lasts through Labor Day. It can start as early as mid June, and go into September, but the normal seems to be July and August. It brings some beautiful clouds, cooler temperatures and much needed moisture to the dessert. For Weddings in Tucson it is the slower season, because of the Summer heat, and also the greater potential of being rained on during your outdoor ceremony. But it provides some good opportunities, such as more open dates (especially Saturdays), discounts, and a hidden benefit of some absolutely gorgeous sunsets. Some of the best Sunset photos at Saguaro Buttes have been taken during the Monsoon season because of the clouds. Many brides worry that it is too hot in Tucson for a Summer wedding when in many cases, in the evening, you may have some wonderful temperatures. Typically the Monsoon rains come in around 3:00 pm-4:00 pm and are over before the Ceremony starts at 6:00 pm. I would advise that if you book a venue for a Summer date, that you make sure then have a plan B, (an indoor location to have the ceremony if necessary) and that they do have air conditioning instead of swamp coolers. These things are important in case on your special day it actually rains at the ceremony time.