Spring Allergies Expected to Worsen in Coming Weeks

Sanford allergist warns of longer tree pollen season due to climate change

Apr. 13, 2026 at 10:38pm

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An extreme close-up X-ray photograph showing the intricate, ghostly internal structure of a tree pollen grain against a dark background, conceptually representing the impact of climate change on seasonal allergies.As climate change extends the spring allergy season, an X-ray view of the microscopic culprit - tree pollen - reveals the complex structures triggering widespread discomfort.Fargo Today

As spring approaches, Sanford allergist Dr. Chris Cleveland warns that tree pollen season is expected to start in late April and last longer than in past years, potentially causing more severe allergy symptoms for many in the region. Climate change has been linked to extended allergy seasons across the country.

Why it matters

Seasonal allergies affect a significant portion of the population, with an estimated 10% of people suffering from allergies. Longer and more intense allergy seasons can disrupt daily life and productivity, and may require more people to seek medical treatment or take medication to manage their symptoms.

The details

According to Dr. Cleveland, tree pollen season typically starts in late April in the Fargo area and can last 4-6 weeks. However, due to climate change, the season is now lasting 6-12 weeks as pollen from states up to 100 miles south drifts northward. This can lead to prolonged allergy symptoms like sneezing, itchy eyes, and a runny nose. Cleveland recommends over-the-counter medications like Zyrtec or Flonase to manage symptoms, and notes that many people also opt for allergy shots for more permanent relief.

  • Tree pollen season typically starts in late April in the Fargo area.
  • In the past, tree pollen season lasted 4-6 weeks.
  • Now, due to climate change, the tree pollen season lasts 6-12 weeks.

The players

Dr. Chris Cleveland

A Sanford allergist who specializes in seasonal allergies and their treatment.

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What they’re saying

“Only about 10% of the population actually suffers from allergies, but just about everybody can be bothered by a lot of particulate matter exposure out there.”

— Dr. Chris Cleveland, Sanford Allergist

The takeaway

As climate change continues to impact seasonal patterns, allergy sufferers in the Fargo area can expect longer and more severe tree pollen seasons in the coming years. Taking proactive steps like using over-the-counter medications or seeking allergy shots can help manage these worsening symptoms.