FleaDates › Flea season › Utah › St. George
St. George · UT
When does flea season start in St. George?
Flea season in St. George typically runs late February to late November, peaking Apr–Oct. That's about 4 weeks earlier than the Utah statewide estimate — city warmth and lower elevation add up.
Ticks in St. George
Local tick activity typically runs year-round, heaviest Mar–Oct. The species to know in Utah: Rocky Mountain wood tick, American dog tick, brown dog tick.
More on species and timing: Utah tick season.
Numbers come from NOAA U.S. Climate Normals (1991–2020) recorded at ST GEORGE — a climate-based estimate; real years wobble.
Frequently asked questions
When does flea season start in St. George?
Around late February 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 St. George different from the rest of Utah?
Somewhat. That's about 4 weeks earlier than the Utah statewide estimate — city warmth and lower elevation add up. The statewide page averages several stations across Utah; this page uses the normals recorded at ST GEORGE.
Do dogs in St. George 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 Utah are typically active mid-February to late November, a longer window than fleas get.