Pollen Count in Brussels
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Brussels, Belgium has a temperate maritime climate with mild winters and cool summers. Rainfall is distributed throughout the year.
Updated: 3/12/2026
Pollen seasons in Brussels typically peak in spring (tree pollen) and late summer/early fall (grass pollen). Weed pollen can also be present.
Air pollution in Brussels can worsen allergic reactions. High pollen counts and wind can exacerbate symptoms. Monitor local forecasts for pollen levels.
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 Brussels 🌾. 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 | 37.5 | 0 | 0 | 0 | 0 | 0 |
| Mar | 631.1 | 291.9 | 0 | 0 | 0 | 0 |
| Apr | 3.3 | 2098.9 | 9.6 | 0 | 0 | 0 |
| May | 0.6 | 90.6 | 104.8 | 0 | 1.4 | 0 |
| Jun | 0 | 0.2 | 839.3 | 75.6 | 0.4 | 0 |
| Jul | 0 | 0.3 | 283.5 | 508.4 | 0 | 0 |
| Aug | 0 | 0 | 61.3 | 113.3 | 0 | 2.5 |
| Sep | 0 | 0 | 4.4 | 5.6 | 0 | 4 |
| Oct | 0 | 0 | 0.1 | 0.3 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(10 km)