If you’ve ever swatted your arm on a warm evening and asked, “When does mosquito season start?”, you’re not alone. These pests seem to appear out of nowhere—and once they arrive, they stick around. Understanding how long mosquito season is, and how it varies across the U.S., is the first step toward staying bite-free.
The Timing Behind Mosquito Season
Mosquitoes don’t go by calendar dates. Their appearance depends on temperature and humidity. Generally, once nighttime temperatures consistently stay above 50°F, mosquitoes begin to breed and feed. That’s why mosquito season can start as early as February in the South and as late as May in the North.
“An understanding of the natural world and what’s in it is a source of not only a great curiosity but great fulfillment.”
— David Attenborough, natural historian
And knowing mosquito season by state can help you prepare smarter, not later.
A Quick Glance at Regional Differences:
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Southern states (e.g., Florida, Texas): Mosquito activity can start in February or March and last until November.
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Midwestern and Northeastern states: Expect activity from late April or May through early October.
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Western states (e.g., California, Arizona): Dryness limits population, but irrigation-heavy areas still see peak seasons from April to September.
How to Make It Through the Season Bite-Free
Once you know your region's mosquito timeline, preparation becomes easier. Proactive steps like removing standing water, using screens, and avoiding peak biting times (dusk and dawn) go a long way.
✔️ Clean birdbaths and pet bowls weekly
✔️ Use fans during outdoor gatherings to keep mosquitoes away
✔️ Avoid dark clothing and heavily scented products outside
✔️ Keep gutters clean to prevent hidden breeding zones
For homeowners in high-risk areas, a powerful outdoor treatment can provide season-long relief. The Tomahawk TMD14 Backpack Fogger is a popular choice for applying mosquito repellents across yards, woodlines, and patios—especially useful during peak months when adult mosquitoes are most active.
“By failing to prepare, you are preparing to fail.”
— Benjamin Franklin
A well-timed approach can mean the difference between a peaceful summer and a season of scratching.
