FleaDates › Flea season › Idaho › Boise
Boise · ID
When does flea season start in Boise?
Flea season in Boise typically runs early April to late October, peaking May–Sep. That's about 2 weeks earlier than the Idaho statewide estimate — city warmth and lower elevation add up.
Ticks in Boise
Local tick activity typically runs mid-February to late November, heaviest May–Oct. The species to know in Idaho: Rocky Mountain wood tick, American dog tick, brown dog tick.
More on species and timing: Idaho tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at BOISE AIR TERMINAL — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in Boise?
Around early 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 Boise different from the rest of Idaho?
Somewhat. That's about 2 weeks earlier than the Idaho statewide estimate — city warmth and lower elevation add up. The statewide page averages several stations across Idaho; this page uses the normals recorded at BOISE AIR TERMINAL.
Do dogs in Boise 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 Idaho are typically active early March to mid-November, a longer window than fleas get.