Most people think mosquitoes are only active in the summer, but it's not really about a specific time of year. Instead, it's about temperature levels. Some species of mosquitoes die off during the colder months, while others will hibernate. The magic number, in this case, is 50?F.

You can generally stop worrying about mosquitoes once the outdoor temperature consistently drops below 10°C (50°F). Because mosquitoes are cold-blooded (ectothermic), they cannot regulate their own body heat and rely on the ambient temperature to function. When temperatures fall below 15°C (60°F), they become lethargic, and once it hits the 10°C mark, most species either enter a state of hibernation (diapause) or die off for the season. In temperate climates, this typically occurs after the first hard frost of the autumn. However, it is important to remember that mosquitoes can "re-emerge" during unseasonably warm winter days if the temperature spikes back above 10°C for a sustained period. In 2026, with changing global weather patterns, "mosquito season" has become longer in many regions, often stretching into late October or early November. If you live in a tropical or subtropical climate, mosquitoes remain active year-round because the temperature rarely stays low enough to trigger their dormant state, meaning year-round vigilance is required.