Mosquitoes are cold - blooded insects, which means their body temperature is regulated by the environment. High temperatures can be lethal to mosquitoes. Generally, when the temperature exceeds 100°F (about 37.8°C), mosquitoes start to struggle. Their metabolism speeds up at high temperatures, and they use up their energy reserves more quickly. As the temperature rises further, above 105°F (about 40.6°C), the heat becomes too intense for most mosquitoes to survive. The proteins and enzymes in their bodies begin to denature, disrupting their normal physiological functions, and eventually leading to death.

Just as high temperatures are detrimental, low temperatures also pose a significant threat to mosquitoes. When the temperature drops below 50°F (about 10°C), mosquitoes become less active. Their movement slows down, and they enter a state of torpor. As the temperature continues to drop, around 32°F (0°C), most mosquitoes will die. At freezing temperatures, the water inside their cells freezes, causing the cells to burst and ultimately resulting in the death of the mosquito. However, some species have adapted to survive in colder climates by entering a state of diapause, a kind of hibernation - like condition, where their development is suspended until warmer temperatures return.

Armed with the knowledge of the temperature thresholds that kill mosquitoes, we can use this information to our advantage. In hot regions, ensuring proper ventilation and cooling in and around living areas can make the environment less hospitable for mosquitoes. During cold months, keeping outdoor areas clean and free of standing water can prevent mosquitoes from laying eggs, as the cold combined with the lack of suitable breeding grounds can reduce their population.