The end of pollen season varies depending on the type of pollen and your location. Generally:
- Tree pollen season ends by late spring or early summer, around May to June, though in some milder climates it can extend into July.
- Grass pollen season typically ends by mid to late summer, around July or August, but can last into early fall in some areas.
- Weed pollen season, especially ragweed, often lasts until the first hard frost, which can be late October to early November in many regions, though it may persist into November in warmer areas.
In summary, for most places, the traditional pollen season ends by September with the end of grass and nettle pollen seasons, but weed pollen can cause allergies into October and November depending on the climate.
