When Will Pollen Season End 2025. This quick guide can help you understand which months have the highest levels of pollen and help. For tree allergies, pollen season generally runs from february to may, grass pollen season runs from april to june, and weed pollen season runs from august to november.
For tree allergies, pollen season generally runs from february to may, grass pollen season runs from april to june, and weed pollen season runs from august to november. When does it start and end?