FleaDates › Flea season › Wyoming › Cheyenne
Cheyenne · WY
When does flea season start in Cheyenne?
Flea season in Cheyenne typically runs early May to mid-October, peaking Jun–Sep.
Ticks in Cheyenne
Local tick activity typically runs late March to mid-November, heaviest May–Sep. The species to know in Wyoming: Rocky Mountain wood tick, American dog tick, brown dog tick.
More on species and timing: Wyoming tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at CHEYENNE — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in Cheyenne?
Around early May 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 Cheyenne different from the rest of Wyoming?
Not meaningfully — Cheyenne tracks the Wyoming statewide estimate closely. Both are climate-based estimates, so treat the edges as fuzzy, not exact.
Do dogs in Cheyenne 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 Wyoming are typically active late March to early November, a longer window than fleas get.