Protecting a fruit tree's blossoms from hard rain, hail, and frost is sometimes required for fruit production. Covering a tree or part of it ahead of damaging weather can save some crop. Cover with garden fabric or a sheet and tie down well. Remove when danger is past. Trees kept small by summer pruning are far easier to protect than large trees.
If the fruit varieties you plant are otherwise capable of reaching enticing quality in your location - high flavor and sweetness or acid-sugar balance - it is well worth the effort to protect some crop by monitoring weather warnings from bud swell to small fruit stage and covering when necessary.