Pollen Count
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Pollen Count in Porvoo

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Porvoo has four main pollen seasons. Spring starts in March with birch trees releasing lots of pollen. This season usually ends in May. Many people stay indoors during this time.

Updated: 2/9/2026

Summer pollen season starts in June with grass pollen filling the air. This season lasts until August. Grass pollen is a major problem for many people in Porvoo.

In late summer, from August to September, weeds release pollen. This season is usually shorter than the others. Weeds like ragweed and nettle cause problems.

In autumn, from September to October, birch and alder trees release pollen again. This season is usually not as bad as the spring one. Pollen counts decrease as winter approaches.

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).

Annual Pollen Overview

Check out this month-by-month overview of the daily average pollen count in Porvoo 🌾. 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 0.1 0 0 0 0 0
Feb 0.4 0 0 0 0 0
Mar 66.5 2.9 0 0 0 0
Apr 93.8 855.7 0.1 0 0.1 0
May 40.6 16335.7 17.3 0 0 0
Jun 0 1.4 264 0.3 0 0
Jul 0 0 211.1 30.6 0 0
Aug 0 0 34.6 11.4 0 0.6
Sep 0 0 3.4 0.1 0 18.6
Oct 0 0 0 0 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 Porvoo 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.
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