Pollen Count in Sundsvallen
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Sundsvallen has many trees, grasses, and flowers. They make pollen. Pollen is in the air when plants grow. It happens every year.
Updated: 3/5/2026
Spring is when trees make pollen. Birch trees make a lot of pollen. It's in the air for a few weeks. People notice it.
Grasses make pollen in late spring and summer. It's in the air for a longer time. Many plants make pollen then. It can be strong.
Weeds make pollen in late summer and fall. It's not as strong as tree or grass pollen. But it can still cause problems.
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 Sundsvallen 🌾. 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 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mar | 3.2 | 0 | 0 | 0 | 0 | 0 |
| Apr | 1.6 | 122.6 | 0 | 0 | 0 | 0 |
| May | 0.4 | 851 | 1 | 0 | 0 | 0 |
| Jun | 0 | 3471.4 | 80.5 | 0 | 0 | 0 |
| Jul | 0 | 20.7 | 263.7 | 2.4 | 0 | 0 |
| Aug | 0 | 0 | 7.3 | 0.6 | 0 | 0 |
| Sep | 0 | 0 | 0.1 | 0 | 0 | 0.3 |
| Oct | 0 | 0 | 0 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |