Wisconsin residents are bracing for what experts predict will be a particularly challenging allergy season. As spring officially arrived on March 19th, the Asthma and Allergy Foundation of America (AAFA) released its annual “Allergy Capitals” report, highlighting the growing impact of climate change on pollen production and allergy severity. The report indicates that longer, more intense pollen seasons are becoming the norm, impacting millions across the country, including those in the Badger State.
The lengthening of allergy seasons is directly linked to a warming climate. Earlier springs and later falls provide pollen-producing trees and plants with an extended period of activity. Simultaneously, rising temperatures in urban areas contribute to increased air pollution, which further stimulates pollen production. This combination creates a perfect storm for allergy sufferers and Wisconsin is not immune. Pollen-counting stations in Milwaukee and Madison have documented allergy seasons that are now up to 50% longer than they were in the past, according to reporting by the Milwaukee Journal Sentinel.
The AAFA’s 2026 report ranked Milwaukee as the 44th-worst city in the U.S. For allergies, and Madison as the 46th. These rankings are based on a composite score considering tree, grass, and weed pollen levels, allergy medication utilize, and the availability of allergy specialists in each city. While not among the most severely affected metropolitan areas, the increasing pollen counts and extended season are still causing significant discomfort for many Wisconsinites.
Wisconsin Allergy Season Forecast: What to Expect in 2026
While pollen counts are currently moderate in southern Wisconsin and low elsewhere as of March 20th, according to the National Allergy Map, levels are expected to rise quickly. In Milwaukee, the forecast predicts a shift to medium-high pollen levels by Sunday, March 22nd, and Monday, March 23rd. Juniper and elm trees are currently the primary sources of allergens.
Looking ahead to the rest of the season, AccuWeather’s 2026 allergy season forecast provides a more detailed outlook:
- Tree pollen: Tree pollen counts are expected to be average across Wisconsin, with peak season arriving around mid-May in the southern part of the state and extending into mid-June in the north.
- Grass pollen: Grass pollen levels are predicted to be high, particularly in July. Above-average rainfall and warmer temperatures across the Great Lakes region are expected to contribute to this increase.
- Weed pollen: Weed pollen counts are forecast to be average, peaking around September. Levels typically decline after the first frost of the fall.
Tracking Pollen Counts in Wisconsin
Staying informed about daily pollen levels is crucial for managing allergy symptoms. The American Academy of Allergy, Asthma and Immunology’s National Allergy Bureau provides up-to-date pollen counts on its national map: pollen.aaaai.org.
Within Wisconsin, pollen-counting stations are located in Greenfield (Milwaukee area), Madison, Appleton, and La Crosse, providing localized data for residents in those regions. These stations collect and report on the concentration of various pollen types in the air.
Strategies for Minimizing Allergy Symptoms
The Asthma and Allergy Foundation of America recommends several proactive steps to prepare for and manage allergy symptoms:
- Monitor pollen counts: Regularly check pollen forecasts and limit outdoor activities on days with high pollen levels.
- Create a pollen barrier at home: Keep windows and doors closed during peak pollen times. Remove shoes upon entering the house and wash clothes immediately after being outdoors. Regular cleaning, including vacuuming and dusting, can also aid reduce indoor pollen levels.
- Utilize air filtration: Employ central air conditioning or air purifiers equipped with HEPA filters to remove pollen from the air.
- Start treatment early: Consult with a healthcare provider about starting allergy medication before pollen levels surge. Early intervention can often prevent symptoms from becoming severe.
Beyond these preventative measures, individuals with severe allergies should ensure they have an updated allergy action plan in place, as recommended by their physician. This plan should outline specific steps to take in the event of a severe allergic reaction.
The changing climate is expected to continue exacerbating allergy seasons in Wisconsin and across the country. The AAFA will release its next comprehensive report in early 2027, providing an updated assessment of allergy trends and potential impacts. Staying informed and taking proactive steps to manage allergies will be increasingly vital for maintaining health and well-being.
Do you have questions about managing allergies this season? Share your thoughts and experiences in the comments below, and please share this article with anyone who might find it helpful.
Disclaimer: This article provides general information about allergy season and should not be considered medical advice. Always consult with a qualified healthcare professional for personalized guidance on managing your allergies.
