Pollen Count in Winterthur

4-Day Chart
Annual Overview

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Winterthur, Switzerland has different pollen seasons. Tree pollen starts in late March. It's high in April and May. Trees like oak, beech, and birch produce a lot of pollen.

Updated: 4/17/2026

Grass pollen season starts in May. It's high in June and July. Grass pollen can travel far. It makes people's noses and eyes feel funny.

Weed pollen season starts in July. It's high in August and September. Weeds like ragweed produce a lot of pollen. This pollen can make people feel icky.

Winterthur's pollen season ends in October. Snow starts falling in December. There is little to no pollen in winter. People can enjoy the snow without pollen.

Pollen Forecast Chart

Recommendations

When pollen concentrations reach a peak, we suggest these simple steps to help with hay fever. These tips are extra important on windy days when plants are in peak anthesis (the time when they release the most pollen).

Wear masks if necessary
Shower after going out
Wear sunglasses if windy
Close windows and doors
Use an indoor air purifier
Avoid wearing woolen clothes outside
Limit outdoor activities

Annual Pollen Overview

Check out this month-by-month overview of the daily average pollen count in Winterthur 🌾. This data is based on previous years and serves as a guideline to help you understand when different pollen seasons typically occur in your city.

	Alder	Birch	Grass	Mugwort	Olive	Ragweed
Jan	0	0	0	0	0	0
Feb	10.2	0	0	0	0	0
Mar	53.9	32	0.2	0	0	0
Apr	3.9	1590.9	40.7	0	0.1	0
May	0.6	104.1	415.1	0	1	0
Jun	0	14.3	1414.5	0.1	2.4	0
Jul	0	0.1	420.8	9.1	0	0
Aug	0	0	106.9	19.1	0	14.3
Sep	0	0	10.8	10.7	0	12.6
Oct	0	0	1.2	1.1	0	0
Nov	0	0	0	0	0	0
Dec	0	0	0	0	0	0

Nearby Places

Disclaimer * The pollen count information provided for Winterthur is for educational purposes only, sourced from the CAMS European air quality database. We cannot guarantee its accuracy or reliability. This information is not a substitute for professional medical advice. Consult a qualified healthcare provider for medical concerns. We are not medical professionals.