Pollen Count in Delft

4-Day Chart
Annual Overview

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Pollen allergies occur when the body reacts to pollen from trees, grasses, and weeds. This can cause sneezing, runny nose, itchy eyes, and congestion.

Updated: 3/22/2026

In Delft, Netherlands, pollen seasons vary by type. Tree pollen season typically starts in March and lasts until May. Grass pollen season starts in May and ends in July.

Weed pollen season, which includes plants like ragweed, lasts from July to September. Each season brings different pollen levels, with some days being worse than others.

Knowing the pollen seasons in Delft can help individuals with pollen allergies prepare and take steps to reduce their exposure to problematic 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 Delft 🌾. 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	9.2	0	0	0	0	0
Mar	174.8	16.4	0	0	0	0
Apr	6	957.5	14.6	0	0	0
May	0.7	128	66.6	0	0.1	0
Jun	0	0.1	521.9	51.7	0.2	0
Jul	0	0.7	177.2	280.1	0	0
Aug	0	0	70.4	62.1	0	0.3
Sep	0	0	12.2	1.4	0	1.3
Oct	0	0	1.2	0.1	0	0
Nov	0	0	0.1	0	0	0
Dec	0	0	0	0	0	0

Nearby Places

Disclaimer * The pollen count information provided for Delft 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.