what temperature do fleas die

Adult fleas die at temperatures colder than 46.4°F (8°C) and hotter than 95°F (35°C) . Immature fleas, which refers to both flea eggs and larvae, are slightly more susceptible to the cold, dying at temperatures below 55.4°F (13°C) . At temperatures below freezing, adult fleas will die even quicker: they will die within 5 days of exposure at temperatures of 30.2°F (-1°C) . The lifespan of an adult flea nearly doubles with just around a 7°F increase in temperatures compared to those at freezing temperatures, with a 10-day survival span at 37.4°F (3°C) . Fleas will die within two days when temperatures exceed 95°F (35°C), with some exceptions dependent on relative humidity. However, fleas can live in temperatures as low as 46 degrees, and it can take up to 5 days of consistently below freezing temperatures to kill an adult flea.