How Wisconsin Winters Make Flu Season Tougher
Medically reviewed by Michele Eggers, Supervisor Quality Health Integration-Clinical
11/10/2025
In Wisconsin, the same long winters that bring cozy nights and snow-covered trails also make flu season hit a little harder. Each year, the flu tends to show up earlier, stick around longer, and cause more severe illness, especially for older adults and people with chronic conditions. But a few simple steps can help protect you and your family this winter.
Why the Flu Hits Harder Here in Wisconsin
The flu season tends to be longer in Wisconsin, and we aren’t alone. In northern states, flu activity often begins as early as October and can last into spring, meaning more months of potential exposure.
Of course, winters in Wisconsin also hit hard. The cold, dry air helps influenza viruses survive longer in the air and spread more easily. And with colder temperatures and a longer winter, comes more time spent indoors.
Indoor gatherings can play a huge role in allowing the flu virus to spread. From Friday fish fries and holiday parties to school concerts and Packers watch parties, those cozy indoor traditions increase close contact and shared air. It creates the perfect conditions for flu to spread.
Then there is winter fatigue. Shorter days and colder temperatures can leave many of us feeling low-energy, less active or less likely to keep up with preventive care. Lower sunlight exposure also affects vitamin D levels, which play a role in immune health.
So, basically, longer and harsher winters in northern states like Wisconsin means more time indoors. It all works together to make it especially easy for the flu virus to spread.
Who’s Most at Risk?
Wisconsin’s population skews older. Nearly one in five residents is age 65 or older, which raises the risk of serious flu complications and hospitalizations in our state.
People with chronic conditions such as diabetes, heart disease, or asthma are also at higher risk, and vaccination can substantially reduce the chance of serious flu-related illness.
Tips to Stay Healthy This Flu Season
- Get your flu shot early. Aim to be vaccinated by the end of October for the best protection; flu vaccines are the first and most important step to reduce your risk. Many local pharmacies and clinics offer convenient, walk-in shots.
- Wash your hands often. Use soap and warm water for at least 20 seconds—especially after public events or touching shared items.
- Improve ventilation. Even in winter, cracking a window briefly or using an air purifier during gatherings can reduce airborne virus concentration.
- Mask when needed. If you’re feeling under the weather or visiting someone at higher risk, a mask provides extra protection.
- Stay home when sick. Rest helps recovery and prevents spreading the virus to family, friends, and coworkers.
- Know when to seek care. Call your provider if symptoms worsen or last more than a few days. Use urgent care or telehealth for moderate symptoms; seek emergency care for chest pain, severe shortness of breath, or confusion.
[Read more: Does Oscillococcinum Work for the Flu?]
How Network Health Can Help
At Network Health, we’re here to help members stay healthy all winter long. Many health plans include the following.
- $0 flu shots and preventive visits at in-network providers (check your plan for details).
- Virtual visits for mild illnesses—easy and warm from home.
- Care coordination and chronic-condition support for members who need extra help during flu season.
Wisconsin winters may be long, but with the right prevention and care, they don’t have to be unhealthy. Take steps now to protect yourself and your family. Stay warm, stay healthy and let’s get through flu season together.
SOURCES:
https://www.dhs.wisconsin.gov/influenza/index.htm
https://www.cdc.gov/flu/vaccines/keyfacts.html
https://www.cdc.gov/flu/index.htmlhttps://pmc.ncbi.nlm.nih.gov/articles/PMC6364647/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3457514/
