Fleas are more likely to die if temperatures hit freezing and stay there for a while. ... The cold can slow down a flea's life cycle, but they can still hatch in the winter. 2. Even if temperatures hit freezing long enough to kill the adults, those fleas may have already found a warmer place to lay their eggs.
What temperature will kill fleas?
It doesn't need to be quite freezing, or 32 degrees Fahrenheit, for fleas to freeze. Once the temperatures fall to 37 degrees, it's cold enough to kill mature fleas as well as eggs, larvae and pupae.
What temperature kills fleas instantly?
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).
