FleaDates › Flea season › Arizona › Flagstaff
Flagstaff · AZ
When does flea season start in Flagstaff?
Flea season in Flagstaff typically runs early May to mid-October, peaking Jun–Sep. That's about 12 weeks later than the Arizona statewide estimate for this climate.
Ticks in Flagstaff
Local tick activity typically runs mid-March to mid-November, heaviest Jun–Sep. The species to know in Arizona: brown dog tick, Rocky Mountain wood tick, American dog tick.
More on species and timing: Arizona tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at FLAGSTAFF PULLIAM AP — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in Flagstaff?
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 Flagstaff different from the rest of Arizona?
Somewhat. That's about 12 weeks later than the Arizona statewide estimate for this climate. The statewide page averages several stations across Arizona; this page uses the normals recorded at FLAGSTAFF PULLIAM AP.
Do dogs in Flagstaff 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 Arizona are typically active year-round, a longer window than fleas get.