Hey guys. How are you? Fleas can live in very hot and cold weather. Fleas usually live in a warm area to be more active and comfortable in a hot area. They can also lay eggs even in cool weather and can hatch even in cool weather. If the host is available, the flea can live in any weather. One article helped me on how to get rid of fleat in carpet . I think that you, too, will find this helpful information.