Memphis sits in one of the most mosquito-active regions in the country due to its warm climate, long summers, and proximity to the Mississippi River and surrounding wetlands. With high humidity, frequent thunderstorms, and extended warm seasons, mosquito activity in Memphis often begins early in the year and continues well into fall.
Spring (March–May)
As temperatures begin climbing into the 60s and 70s, Memphis sees an early surge in mosquito activity.
Heavy spring rains and rising river levels create floodwater pools, roadside ditches, and marsh-like pockets that spark the first big wave of mosquitoes.
Warm nights accelerate larval development.
Species like Aedes mosquitoes emerge aggressively in shaded yards and near standing water.
Spring often sets the tone for the entire season wetter years bring earlier and larger mosquito spikes.
Summer (June–August)
Mosquito season hits its peak during Memphis’ hot, humid summer months.
Heat shortens the mosquito life cycle to 7–10 days, allowing populations to explode.
High humidity helps adult mosquitoes survive longer and stay active throughout the day.
Frequent thunderstorms refill storm drains, buckets, and flooded low areas, enabling continuous breeding.
The Mississippi River basin and Wolf River Greenway contribute to persistent mosquito pressure across the metro.
Culex species tied to West Nile virus become especially active in the warm, stagnant nighttime conditions typical of Memphis summers.
Early Fall (September–October)
Mosquito activity often continues strongly into early fall due to warm temperatures and lingering humidity.
Late-season rainstorms create new breeding pockets.
Warm spells allow adult mosquitoes to remain active into October.
Culex populations remain a concern until nighttime temperatures consistently drop into the 50s.
Milder falls in recent years have extended mosquito season deeper into autumn across the region.
Winter (November–February)
Cold weather reduces mosquito activity, but populations don’t disappear entirely.
Eggs from Aedes species overwinter in soil and dormant containers.
Warmer-than-average winter days increasingly common in the Mid-South can trigger brief bursts of adult activity.
Winter moisture and mild spells can help prime the region for heavier activity when spring arrives.
