Pollen Count in Willebroek
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Willebroek, Belgium has pollen seasons. Trees, grasses, and weeds make pollen. Pollen is in the air. It comes from nearby forests, grasslands, and fields.
Updated: 4/14/2026
Spring is the first pollen season. Trees like oak, birch, and hazel make a lot of pollen. This is usually in March and April. The pollen count is high.
Summer is the second pollen season. Grasses and weeds make pollen. This is usually in May and June. The pollen count is very high then.
Autumn is the last pollen season. Weeds like ragweed make pollen. This is usually in August and September. The pollen count can still be high.
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 Willebroek 🌾. 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 | 52.6 | 0 | 0 | 0 | 0 | 0 |
| Mar | 612.8 | 260.3 | 0 | 0 | 0 | 0 |
| Apr | 4.6 | 2352.2 | 13.9 | 0 | 0 | 0 |
| May | 0.6 | 100.5 | 131.3 | 0 | 1.2 | 0 |
| Jun | 0 | 0.1 | 1017.5 | 39.8 | 0.4 | 0 |
| Jul | 0 | 0.3 | 351 | 245.7 | 0 | 0 |
| Aug | 0 | 0 | 81 | 64.9 | 0 | 1.3 |
| Sep | 0 | 0 | 6.6 | 3.1 | 0 | 2.5 |
| Oct | 0 | 0 | 0.3 | 0.2 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(5 km)