Pollen Count in Grandson
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Grandson, Switzerland has different pollen seasons. Tree pollen starts in March. It's a big problem for people. Trees like oak, beech, and birch make a lot of pollen.
Updated: 4/20/2026
Grass pollen season starts in May. It's very strong. Grasses and weeds make a lot of pollen. This is when people have the most problems.
Weed pollen season starts in July. It's smaller than tree and grass pollen. But some people still have issues. Weeds like ragweed make pollen.
Pollen seasons end in September. The air gets cleaner. People can go outside without problems. Winter comes and pollen disappears.
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 Grandson 🌾. 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 | 13 | 0 | 0 | 0 | 0 | 0 |
| Mar | 30.6 | 68 | 0.1 | 0 | 0 | 0 |
| Apr | 4 | 1904.1 | 30.8 | 0 | 0.2 | 0 |
| May | 0.9 | 271.3 | 408.4 | 0 | 3.2 | 0 |
| Jun | 0 | 3.9 | 1524.1 | 0.1 | 4.7 | 0 |
| Jul | 0 | 0 | 482.2 | 7 | 0 | 0 |
| Aug | 0 | 0 | 103.6 | 13 | 0 | 11.5 |
| Sep | 0 | 0 | 8.5 | 7.3 | 0 | 9.4 |
| Oct | 0 | 0 | 0.6 | 0.9 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(29 km)