FleaDates › Flea season › Montana › Billings
Billings · MT
When does flea season start in Billings?
Flea season in Billings typically runs late April to mid-October, peaking Jun–Sep.
Ticks in Billings
Local tick activity typically runs mid-March to mid-November, heaviest May–Sep. The species to know in Montana: Rocky Mountain wood tick, American dog tick, brown dog tick.
More on species and timing: Montana tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at BILLINGS LOGAN INTL AP — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in Billings?
Around late April in a typical year, once local averages hold around 50°F. A warm spring pulls it earlier — prevention shouldn't wait for the calendar.
Is flea season in Billings different from the rest of Montana?
Not meaningfully — Billings tracks the Montana statewide estimate closely. Both are climate-based estimates, so treat the edges as fuzzy, not exact.
Do dogs in Billings need prevention outside flea season?
Yes — vets recommend year-round parasite prevention regardless of the local calendar. Indoor fleas ignore the weather entirely, and ticks in Montana are typically active late March to early November, a longer window than fleas get.