Pollen Count in Viseu

4-Day Chart
Annual Overview

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Viseu, Portugal has different pollen seasons. Trees, grasses, and weeds release pollen. Pollen comes out at different times. Spring and summer are the main pollen times.

Updated: 3/2/2026

Tree pollen starts in February. It peaks in March and April. Many trees release pollen then. Oak, pine, and cedar trees are big pollen releasers.

Grasses release pollen in May and June. Weeds release pollen in summer and autumn. Some plants release pollen in winter. Olive trees are a big pollen source.

Pollen counts are usually high in morning and evening. Weather affects pollen counts. Rain helps, but sunny days make pollen counts go up.

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 Viseu 🌾. 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	2	0	0	0	0	0
Feb	3.1	0	1.3	0	0	0
Mar	0.1	90.2	12.5	0	0	0
Apr	0	59.5	128.6	0	56.6	0
May	0	1.4	448.5	0	285.2	0
Jun	0	0	363.2	0	24.2	0
Jul	0	0	147.7	0	1	0
Aug	0	0	56.5	1.8	0	0.3
Sep	0	0	10	0.7	0	0.7
Oct	0	0	0.2	0.1	0	0
Nov	0	0	0	0.6	0	0
Dec	0	0	0	0	0	0

Nearby Places

Disclaimer * The pollen count information provided for Viseu 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.