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