Pollen Count in Rotterdam
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Rotterdam, Netherlands has a moderate maritime climate with cool summers and mild winters. This climate is ideal for a variety of plants and trees, leading to a longer pollen season.
Updated: 2/25/2026
The pollen season in Rotterdam typically starts in late March with tree pollen, followed by grass pollen in May and weed pollen in late summer. Some people may experience allergic reactions during these periods.
The weather in Rotterdam can also affect pollen levels, with warm and dry conditions increasing pollen release. However, rain can help to reduce pollen concentrations in the air. Overall, being aware of the local pollen season and weather conditions can help individuals with allergies to better manage their symptoms.
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 Rotterdam 🌾. 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 | 11.4 | 0 | 0 | 0 | 0 | 0 |
| Mar | 211.4 | 8.3 | 0 | 0 | 0 | 0 |
| Apr | 5.4 | 674 | 18.5 | 0 | 0 | 0 |
| May | 0.7 | 128.2 | 93 | 0 | 0.2 | 0 |
| Jun | 0 | 0.1 | 652.4 | 48.3 | 0.2 | 0 |
| Jul | 0 | 0.6 | 248.6 | 285.9 | 0 | 0 |
| Aug | 0 | 0 | 92.6 | 68.6 | 0 | 0.3 |
| Sep | 0 | 0 | 14.2 | 1.4 | 0 | 1.3 |
| Oct | 0 | 0 | 1.6 | 0.1 | 0 | 0 |
| Nov | 0 | 0 | 0.1 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(9 km)