Louisiana pollen and allergy seasons
Louisiana has a long humid season, with oak in early spring, grass through the warm months, and ragweed in the fall.
Twelve month pollen calendar
What is active in September
Cities in Louisiana
No tracked cities yet for Louisiana.
Today and worst today come from live readings where available. Typical shows the usual level for this month from the seasonal profile.
Pollen is only half of what's in the air. See today's air quality in Louisiana for ozone, dust, and smoke readings by city.
The Louisiana allergy season
Allergy levels in Louisiana peak in March, when oak pollen runs highest. The season moves through tree pollen around March, grass in April, weed pollen such as ragweed in September. Levels start to climb around February. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Louisiana?
Pollen levels in Louisiana usually begin climbing in February and reach their highest point in March.
What is the worst month for allergies in Louisiana?
March is typically the worst month in Louisiana, driven by oak pollen.
When does ragweed season end in Louisiana?
Ragweed pollen in Louisiana usually fades by the end of November, after the first hard frost in colder areas.
When is the best time for allergies in Louisiana?
January usually brings the lowest pollen levels of the year in Louisiana.