Hi Steve, Blast Zone instructional materials mention not to use inflatables in extreme weather conditions, or in extreme temperatures. For example, you wouldn’t want to use your inflatable in the event of precipitation, and you’d also want to avoid using your inflatable in low temperatures such as 40 degrees or below. Even 50 degrees is still fairly cold. Even with this general recommendation provided, it is the adult’s responsibility to make the decision of whether or not it’s safe to go outside to play. The adult in charge should also pay extra attention to properly dressing kids for safe outdoor play in cooler temperatures as well. Sincerely, Blast Zone Support