Pollen Count
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Pollen Count in Leuven

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In Leuven, Belgium, trees start producing pollen in late March. This is the start of pollen season. Birch and oak trees release pollen into the air.

Updated: 2/22/2026

In April, grasses and weeds join in, releasing even more pollen. This makes pollen counts very high. People who react to pollen might start to feel symptoms.

In May, grasses and weeds release less pollen. Tree pollen is still present, but not as much as in April. Pollen counts start to go down.

By June, most trees and plants have stopped releasing pollen. Pollen counts are very low. The air is cleaner, and symptoms usually go away. Summer is pollen-free!

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 Leuven 🌾. 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 45.6 0 0 0 0 0
Mar 541.7 340.9 0 0 0 0
Apr 3.5 2372.4 13.4 0 0 0
May 0.6 88.2 126.8 0 1.2 0
Jun 0 0.2 971.1 44.3 0.4 0
Jul 0 0.3 330.5 291.8 0 0
Aug 0 0 75.9 65.6 0 1.8
Sep 0 0 6.6 3.6 0 3.4
Oct 0 0 0.3 0.2 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 Leuven 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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