Fall Allergies, Causes, Signs, Duration & Relief
Some people are allergic to foods, scents, or chemicals, but you can avoid them if you’re careful. Fall allergies are more difficult to avoid. Decaying plants and cooler temperatures create a hostile environment for those with hay fever. Even staying indoors doesn’t always prevent a reaction.
Autumn allergic rhinitis may be mild or severe depending on how susceptible you are. It may cause breathing problems that may require respiratory care. This therapy offers individualized care plans designed to manage your symptoms, including guidance and education on your condition. For more information on autumn allergies, keep reading.
Causes of Fall Allergies
According to experts, autumn allergies, or hay fever, are a type of allergic rhinitis 1. They also state that pollen is the main cause of these reactions. In autumn, weed pollen peaks, and if it’s warm, grass pollen also increases. August-blooming plants also release pollen, like ragweed, mugwort, cocklebur, nettle, and several more.
Experts also mention several other factors contributing to fall allergies 2. As leaves and plants decay, mold spores grow and thrive. Pets pick up allergens outdoors and increase dander build-up if they spend more time inside. Even cooler temperatures, climate changes, exposure to toxins, pollution, and microbiome changes increase the chances of a reaction 3.
Symptoms
Fall allergies have the same symptoms as those you experience earlier in the year when spring plants bloom. Medical professionals say the most common reactions are sneezing, runny nose, post-nasal drainage, and itchy or watery eyes 4. These symptoms vary in severity depending on your reaction and how much you’re exposed to autumn allergens.
Many of these symptoms are also similar to those you’d experience with a cold or flu. However, a virus may usually last for a week or two and often includes sore throat, fever, and other symptoms. Autumn allergies last much longer, sometimes spanning months before you feel any relief.
When does fall allergy season start and end?
According to allergy experts, ragweed is the most problematic autumn allergen 5. These sprout in mid-August, and each plant produces up to a billion pollen grains. The wind or animals can carry these spores over 100 miles. So, even if you don’t have any in your area, they can still trouble you.
These experts also say that due to climate change, fall allergies don’t necessarily end as early as they used to. In fact, they may last three weeks longer than usual in some areas. So, instead of relief in late September, you may be dealing with uncomfortable symptoms well into October.
How to prevent them naturally if medicine doesn’t help?
Unfortunately, you can’t prevent allergies from hindering your fall activities. However, several natural methods help minimize your exposure to pollen and other allergens. Some expert tips include staying indoors when pollen counts are high and keeping your windows closed 6. If you must go outside, wear sunglasses to keep pollen out of your eyes, and change clothes and shower when returning home.
Other tips include consistent vacuuming, washing your sheets more often, and using an air purifier. You may also want to keep pets off your bed after they’ve been outside. Some foods, including onions, garlic, tuna, yogurt, and cabbage, may also help relieve allergy symptoms in some people, though not everyone experiences the same benefits 7.
Resources:
- Cleveland Clinic, Sept. 9, 2026, Why Are You Getting Allergies in the Fall?
https://health.clevelandclinic.org/fall-allergies - Northwestern Medicine, May 2026, Fall Allergies: Symptoms, Causes and Treatment Options
https://www.nm.org/healthbeat/healthy-tips/fall-breezes-and-autumn-sneezes - Rochester Regional Health, Aug. 26, 2026, Are My Fall Allergies Worse in 2026
https://www.rochesterregional.org/hub/fall-allergies - VCU Health, Sept. 3, 2025, Your guide to managing fall allergy symptoms: What triggers them and how to cope
https://www.vcuhealth.org/news/your-guide-to-managing-fall-allergy-symptoms-what-triggers-them-and-how-to-cope/ - ACAAI, Late Summer is the Time to Start preparing for Fall Ragweed Season
https://acaai.org/resource/late-summer-is-the-time-to-start-preparing-for-fall-ragweed-season/ - Cleveland Clinic, Mar. 20, 2026, Home Remedies and Prevention Tips for Seasonal Allergies
https://health.clevelandclinic.org/natural-remedies-for-seasonal-allergies - Northwell Mather Hospital, Combating Fall Allergies
https://www.matherhospital.org/wellness-at-mather/diet-nutrition/combating-fall-allergies/
This article contains informational and educational materials and does not replace health or medical advice. For questions or concerns regarding your medical condition or health objectives, speak to a qualified physician or healthcare provider.
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