Pollen Count in Bülach
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Bülach, Switzerland has different pollen seasons. Trees produce pollen in spring, from March to May. This is when many trees start growing new leaves.
Updated: 4/6/2026
Grass pollen season starts in late spring and lasts through summer. June and July have the most grass pollen. This makes summer days uncomfortable.
Weed pollen season happens in late summer and fall. Some weeds produce pollen in August and September. This pollen can travel far.
Winter months have little to no pollen. Snow and cold weather stop plants from producing pollen. It's a break from pollen in Bülach during winter.
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 Bülach 🌾. 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 | 14.3 | 0 | 0 | 0 | 0 | 0 |
| Mar | 227.4 | 40.4 | 0.1 | 0 | 0 | 0 |
| Apr | 3.7 | 1678.1 | 35.5 | 0 | 0.1 | 0 |
| May | 0.5 | 89.8 | 362.2 | 0 | 1 | 0 |
| Jun | 0 | 11.8 | 1260.1 | 0.1 | 2.5 | 0 |
| Jul | 0 | 0.1 | 366.9 | 9.7 | 0 | 0 |
| Aug | 0 | 0 | 92.8 | 19.5 | 0 | 8.9 |
| Sep | 0 | 0 | 8.7 | 10.9 | 0 | 8.6 |
| Oct | 0 | 0 | 1 | 1.1 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(17 km)
(50 km)