In theory, yes. However, just keep it covered, and out of area where things are blowing area, such as your back porch. I'm assuming you are cooling it somehow with an ice bath or chiller. Remember, you don't need to add the yeast until it is at fermentation temperature. If you need to drop it in a swamp cooler or freezer until it's cool enough to pitch, that's fine.
BTW, keeping the fermenter cool is one of the most important things you can do for your first batches of beer.