What month do yellow jackets go away?

What month yellow jackets go away depends on climate and weather, as they are seasonal insects with annual colonies that die in fall, but generally yellow jackets go away in late fall, around October and November, when first frosts occur and temperatures drop. In spring, queens emerge from overwintering and start new nests. Colonies grow through summer, reaching peak in August and September when they are most active and aggressive. As temperatures cool in October, workers become sluggish and die, and colony declines, with only newly mated queens seeking sheltered places like under bark, in attics, leaf litter, or wall cavities to overwinter in dormant state, while old queen, workers, and males die. In colder northern climates, yellow jackets go away earlier, in October, with first hard frost, while in warmer southern climates like Florida and Texas, they may remain active into November or even December, and in very warm areas some colonies may survive mild winters. So month they go away is typically October to November, with complete disappearance by late November in most temperate areas. To prevent return next year, remove old abandoned nests in winter, clean area to remove pheromones, seal cracks around windows and doors, and keep food and trash sealed in spring to make yard less attractive for new queens starting nests.