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Florida mosquito populations cycle predictably through the year. Knowing when populations peak helps you treat preemptively. Here is the month-by-month calendar.
January-February — Lowest pressure
Cold weather suppresses mosquito activity. Some occasional warm days bring brief activity bursts. Population maintenance treatment minimal.
March — Population start
Spring warming triggers egg hatching from overwintering populations. First treatment of the year. Apply Bifen IT to yard.
April — Active building
Population builds rapidly. Begin standing water elimination weekly. Continue Bifen IT every 30-45 days.
May — Major surge
First major peak of the year. Population grows daily. Mosquito traps and Thermacell devices come out.
June-July — Peak season part 1
Combination of high temperatures, humidity, and rainfall = peak mosquito breeding. Maximum DIY effort required.
August-September — Peak season part 2
Hurricane season + warm temperatures = highest annual populations. Expect surges 7-14 days after every tropical storm.
October — Decline begins
First cool fronts begin reducing populations. Continue treatment as long as warm weather persists.
November-December — Tapering
Cool weather reduces breeding. Treatment intensity decreases. Last yard treatment of the year typical in November.
Annual treatment summary
- Bifen IT yard spray: 6-8 applications March-October.
- Standing water elimination: Weekly April-October.
- Thermacell devices: Continuous use May-September outdoors.
- Personal repellent: Daily during peak months.
Verdict
Florida mosquito season runs effectively year-round in South Florida and March-November in North Florida and the Panhandle. Plan for 6-8 yard treatments annually with weekly standing water elimination during peak season.
Reminder: Always read product labels and follow safety instructions.