Pollen season typically lasts from late winter or early spring through to autumn, roughly February to October, but the exact duration depends on the type of pollen and the region.
- Tree pollen season usually starts earliest, from February or March and lasts until late spring or early summer (May to June), sometimes extending into July in milder climates
- Grass pollen season peaks in late spring and summer, generally from May through July or August, and can sometimes extend into early autumn depending on local conditions
- Weed pollen season , notably ragweed, tends to occur later, peaking in late summer and autumn (August to October or even November in warmer areas)
Overall, the full pollen season can span about 8 to 9 months, from February through October, with overlapping periods of different pollen types causing prolonged allergy symptoms for many
. In some regions, pollen exposure can occur nearly year-round due to varying plant species and climate factors
. Factors such as location, climate, and weather patterns influence the length and intensity of pollen seasons, with warmer areas often experiencing longer seasons
. Climate change is also contributing to longer and more intense pollen seasons in many places
. In summary, pollen season typically lasts about eight months, from late winter or early spring through autumn, with distinct peaks for tree, grass, and weed pollens throughout that period.
