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Southeast · AL
When does flea season start in Alabama?
Flea season in Alabama typically runs late January to mid-December, with the heaviest pressure Apr–Oct. Outside that window outdoor fleas slow down — they don't disappear.
The Alabama flea picture
Alabama's winters rarely bite hard — January still averages 47°F statewide — so fleas get only a brief pause before ramping back up in February. From April through October the state sits at peak flea pressure, with humid summers in the low 80s keeping eggs and larvae thriving in shaded yards from Mobile to Huntsville. Even during that short midwinter lull, fleas overwinter happily indoors, which is why vets here treat prevention as a twelve-month habit.
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 Alabama
| Month | Typical pressure | Average temperature |
|---|---|---|
| January | Low | 47°F |
| February | Moderate | 51°F |
| March | Moderate | 57.8°F |
| April | Peak | 65.1°F |
| May | Peak | 73°F |
| June | Peak | 79.7°F |
| July | Peak | 82.3°F |
| August | Peak | 81.9°F |
| September | Peak | 77.2°F |
| October | Peak | 66.8°F |
| November | Moderate | 56°F |
| December | Low | 49.4°F |
Estimates from NOAA U.S. Climate Normals (1991–2020), averaged across 4 weather stations near Alabama'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 Alabama — check the city closest to you:
Ticks are a different calendar. In Alabama tick activity typically runs year-round — see the Alabama tick season page.
Frequently asked questions
When does flea season start in Alabama?
Around late January in a typical year, once average temperatures hold around 50°F — the point where fleas begin reproducing in earnest outdoors. Warm springs pull that earlier, which is a good argument for not waiting.
When does flea season end in Alabama?
Outdoor flea pressure typically fades around mid-December, when sustained cold shuts down reproduction outside. Indoors is another story — heated homes stay flea-friendly all winter.
Does my dog need flea prevention in winter in Alabama?
Yes — veterinary organizations recommend year-round prevention everywhere, Alabama 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 Alabama?
Ticks run on their own, earlier calendar — in Alabama that's year-round. See the Alabama tick season page for the month-by-month picture and the species involved.