Ragweed Season Is Starting: How to Get Ahead of NYC's September Asthma Peak Before School Begins

Key Takeaways

• Ragweed pollen season in the New York area begins in early August, peaks in mid-September, and continues until the first hard frost, typically in late October.
• September is known nationally as the "September Asthma Peak," a well documented, recurring spike in asthma related ER visits driven by the combination of ragweed pollen and the return to school, where more time indoors with more respiratory viruses circulating layers cold and flu triggers on top of peak pollen exposure.
• A single ragweed plant can release roughly a billion pollen grains in one season and travels for miles on the wind, so starting a daily nasal steroid and confirming your asthma action plan two to four weeks before symptoms typically start is far more effective than waiting until symptoms are already flaring.
• Ragweed pollen is also linked to oral allergy syndrome, so some ragweed allergic patients notice itching in the mouth after eating melon, cucumber, zucchini, or banana during this season.

Why the calendar matters here

Ragweed is the dominant fall allergen across the greater New York area, and prevailing winds carry huge amounts of it into the city from agricultural and suburban land in New Jersey and Long Island. The season typically begins in early August, becomes noticeable through the middle of the month, and reaches its peak in mid-September, right around the same weeks that kids across the city are heading back into classrooms.

That timing is not a coincidence in terms of its impact. The combination of peak outdoor ragweed pollen and a sudden return to indoor, shared classroom spaces (with all the seasonal colds and viruses that come with it) is exactly what drives the well known September Asthma Peak seen in ER visit data year after year.

Why ragweed hits asthma patients so hard

It is one of the most potent allergens there is

A single ragweed plant can produce roughly a billion pollen grains over a season. The pollen is extremely lightweight, which lets it travel for miles on the wind. That means even families who live far from any visible ragweed plants can still have significant exposure on a windy September day.

The back to school effect compounds it

Once school starts, kids spend more hours in enclosed classrooms with dozens of other students, which increases exposure to the rhinoviruses and other respiratory infections that are also common asthma triggers. A child with ragweed allergy and reactive airways can be dealing with pollen exposure on the walk to school and a cold picked up in the classroom in the same week, and either one alone can trigger a flare.

Every year without fail, our schedule fills up in mid to late September with families whose child's asthma had been quiet all summer and suddenly is not. It is almost never one single cause. It is ragweed pollen plus a classroom cold plus a controller inhaler that was not restarted after a summer off. The families who come in during August to get ahead of it have a much easier September than the ones who wait for the first bad flare.

— Yuliya Leviyev, NP, Allergy Asthma

What this looks like for families across NYC

Outdoor school activities and recess put kids in direct contact with peak ragweed pollen during the exact weeks it is most concentrated. Apartment window units and older HVAC systems can pull outdoor pollen indoors if filters are not maintained, which keeps exposure going even after school lets out for the day. Melon, cucumber, and zucchini, common in late summer meals and school lunches, can also cause mouth itching in ragweed allergic kids and adults due to oral allergy syndrome, which is often mistaken for a food allergy rather than a pollen cross reaction.

How to get ahead of it now

Start a daily intranasal steroid two to four weeks before symptoms typically begin rather than waiting for the first stuffy morning, and confirm or update your child's asthma action plan with the school nurse before the first day back, including a current rescue inhaler. Check and replace HVAC or window unit filters before ragweed season peaks, keep windows closed on high pollen count days, and shower and change clothes after extended time outdoors to avoid tracking pollen through the house. If you or your child has ragweed allergy, keep an eye out for mouth itching after melon, cucumber, or banana, since this is a recognized cross reaction and not cause for alarm on its own.

When to book a visit

Consider getting on the schedule if your child's asthma has been well controlled over the summer but you want a plan in place before symptoms typically return in September, if your seasonal allergy symptoms have historically been severe enough to affect sleep or school and work performance, if you are not sure whether your current medication routine is enough to get through ragweed season, or if your child has had asthma flares tied to the start of the school year in past years. Getting a visit on the calendar in late July or early August, before ragweed pollen ramps up, gives us time to adjust medications and confirm an action plan before the peak weeks hit rather than reacting once symptoms have already started.

Disclaimer: This content is educational and does not substitute for medical advice. Always consult your physician for personal medical questions.