Knoxville’s warm, humid climate and abundant vegetation make it a welcoming environment for several mosquito species. Nestled in the Tennessee Valley, the area’s combination of rainfall, shaded landscapes, and long summers allows multiple species to thrive across both suburban and rural neighborhoods.
While more than 60 mosquito species exist statewide, only a few dominate daily life for Knoxville residents—particularly during late spring through early fall. Knowing which species are most active helps homeowners understand local patterns and take informed steps toward prevention.
Easily identified by its distinctive black-and-white striped body, Aedes albopictus is one of the most aggressive and widespread mosquito species in East Tennessee. It’s a daytime biter and thrives in shaded, humid areas like gardens, under decks, and near thick vegetation. The Asian tiger mosquito lays its eggs in small containers, gutters, and other sources of stagnant water commonly found around homes.
Though less common than in southern coastal regions, Aedes aegypti has been recorded in parts of Tennessee and can occasionally appear in Knoxville. It favors human environments, especially where water collects in artificial containers and bites primarily during daylight hours. This species is capable of transmitting viruses such as dengue and Zika, though local transmission remains rare in the region.
Most active during dusk and dawn, Culex pipiens is a common nighttime biter across Knoxville. It breeds in stagnant water containing organic matter such as birdbaths, storm drains, and neglected containers and is a known carrier of the West Nile virus. Populations rise quickly following periods of heavy rain and warm temperatures.
Mosquito activity in Knoxville typically begins in March or April and peaks by July when warmth and humidity reach their highest levels. Aedes species dominate daytime hours, especially in shaded outdoor areas, while Culex mosquitoes emerge during evenings and nights. Although activity drops after the first frost, mild autumns can extend the season well into October.
