How long can you leave cool whip out before it melts?

Cool Whip, when left out at room temperature, can typically maintain its form for about 2 hours. After this time, the texture may start to soften significantly, and it can begin to melt. In warmer environments, this time can be reduced, so it's best to keep it chilled until ready to serve. Always check for any signs of spoilage if left out longer than recommended.