FleaDates › Flea season › Louisiana
Southeast · LA
When does flea season start in Louisiana?
Louisiana doesn't really get a flea off-season: average temperatures stay warm enough for fleas to keep breeding in every month, with the heaviest pressure Mar–Nov.
The Louisiana flea picture
Louisiana never really hands fleas an eviction notice: January averages near 52°F statewide, and activity stays moderate straight through winter before the March-to-November peak takes over. New Orleans humidity turns shaded courtyards and crawl spaces into flea nurseries for most of the year, and Baton Rouge and Shreveport aren't far behind. Prevention here is a year-round line item, not a seasonal one.
One thing that's true in every state: indoor fleas are year-round everywhere. A heated house in January is a fine flea nursery, which is why the calendar above describes outdoor pressure — not whether fleas are possible.
Month-by-month flea pressure in Louisiana
| Month | Typical pressure | Average temperature |
|---|---|---|
| January | Moderate | 51.7°F |
| February | Moderate | 55.4°F |
| March | High | 61.8°F |
| April | Peak | 68.3°F |
| May | Peak | 76°F |
| June | Peak | 81.9°F |
| July | Peak | 84°F |
| August | Peak | 84°F |
| September | Peak | 79.5°F |
| October | Peak | 70°F |
| November | High | 59.8°F |
| December | Moderate | 53.6°F |
Estimates from NOAA U.S. Climate Normals (1991–2020), averaged across 3 weather stations near Louisiana's larger cities, with activity thresholds from published veterinary and entomology research. Real years run early or late with the weather.
Flea season near you
Climate shifts even within Louisiana — check the city closest to you:
Ticks are a different calendar. In Louisiana tick activity typically runs year-round — see the Louisiana tick season page.
Frequently asked questions
When does flea season start in Louisiana?
There's no true start, because it never really stops: Louisiana's average temperatures support flea activity in essentially every month of the year. Pressure climbs highest Mar–Nov.
When does flea season end in Louisiana?
It doesn't, in the on/off sense. The quietest months still sit at or near the temperatures fleas need, so Louisiana vets treat flea control as a twelve-month habit rather than a season.
Does my dog need flea prevention in winter in Louisiana?
Yes — veterinary organizations recommend year-round prevention everywhere, Louisiana included. Fleas overwinter indoors on pets and in bedding regardless of the weather outside, and a warm snap can restart outdoor activity early. The season calendar tells you when to be extra vigilant, not when to stop.
What about ticks in Louisiana?
Ticks run on their own, earlier calendar — in Louisiana that's year-round. See the Louisiana tick season page for the month-by-month picture and the species involved.