Pollen Count in Rouen

4-Day Chart
Annual Overview

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Rouen, France has pollen seasons. Trees release pollen in spring, usually March and April. This makes people feel unwell outside. Pollen counts are high on warm, sunny days.

Updated: 3/21/2026

Grasses and weeds also produce pollen. This happens in late spring and summer, May and June. Pollen counts are higher in countryside areas. City areas have less pollen.

Rouen's pollen season ends in summer. August and September have lower pollen counts. Weather changes affect pollen release. Rain washes away pollen from air.

Rouen's pollen calendar helps track pollen release. Tree pollen in March and April. Grass pollen in May and June. Weeds produce pollen in summer and early fall.

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 Rouen 🌾. 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	6.7	0	0	0	0	0
Mar	257	101.1	0	0	0	0
Apr	3.7	1975.3	15.8	0	0	0
May	0.5	44.3	146	0	3.6	0
Jun	0	0	741.1	10.6	0.4	0
Jul	0	0	268	84.6	0	0
Aug	0	0	49	21	0	0.5
Sep	0	0	3.2	13.6	0	1.7
Oct	0	0	0.1	1.6	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 Rouen 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.