At what temperature would it be too cold for mosquitoes not to be active?

Mosquitoes are cold-blooded creatures and generally do not bite in temperatures below 50F. Mosquitoes living in regions where some seasons are freezing or waterless spend part of the year in diapause; they delay their development, typically for months, and carry on with life only when there is enough water or warmth for their needs.

A mosquito’s life cycle has four stages– egg, larva, pupa, and adult. They need water to breed since all mosquitoes spend their larval and pupal stages in water. Mosquitoes can carry diseases such as malaria, yellow fever, West Nile, dog heartworm, and viral encephalitis. By minimizing the amount of standing water around your home the breeding of mosquitoes can be significantly reduced.

In recent news, a mosquito sample collected three decades ago in Israel's Negev Desert uncovered a previously unknown virus that is closely related to some of the world's most dangerous mosquito-borne pathogens. Scientists believe it could be the key to developing new vaccines and drugs. "This virus is unique — it's related to all of these mosquito-borne viruses that cause disease and cycle between mosquitoes and animals, and yet it is incapable of infecting vertebrate cells," said University of Texas Medical Branch at Galveston graduate student Farooq Nasar.