Pumpkins can last for a few weeks when left outside. If you want to extend their life, however, it is best to bring them inside or keep them in a cool, dry place. For best results, make sure the pumpkin is kept out of direct sunlight and away from any sources of moisture. Taking these precautions will help ensure that your pumpkin remains intact long enough to create unique decorations or carve a festive jack-o-lantern.