Head Lice love summer time. Lice prefer warm weather and they actually reproduce more rapidly in the summer. Lice lay more eggs and the eggs mature more quickly. Your child is still being exposed to head lice in the summer. Play dates, dance class, camp, family reunions, sleepovers. In fact head lice are more common in summer because lice love the warm weather, so they reproduce more rapidly. The most recommended head lice removal treatment is combing.