New Orleans, LA Pollen Levels Today

New Orleans sits in a humid subtropical climate where mild winters, abundant rainfall, and a long growing season create one of the most prolonged and intense allergy profiles in the United States.

Tree pollen typically kicks off the season as early as late January and peaks from February through April, with oak (especially live oak), pecan, cedar, cypress, pine, sweetgum, and mulberry among the dominant contributors—oak pollen in particular blankets the city in a yellow-green dust each spring.

As tree pollen wanes, grass pollen takes over from April through September, driven largely by Bermuda, Johnson, Bahia, and ryegrass, with a notable overlap in late spring when lingering tree pollen and rising grass counts can significantly intensify symptoms.

Weed season follows in late summer and autumn, running from August through October, with ragweed as the primary culprit alongside pigweed, sorrel, and lamb's quarters.

Beyond pollen, the city's persistent humidity, frequent rainfall, and low elevation make mold spores—both indoor and outdoor—a year-round concern, while dust mites thrive in warm interiors and hurricane-related moisture damage often worsens exposure.

Overall, New Orleans is defined by a near year-round allergy season, with mold and oak pollen standing out as the region's signature triggers.