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