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