Sundsvall Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Sundsvall is low; mold (cladosporium) is low.
Pollen Tomorrow
Tomorrow (11 October 2026) levels are similar to today.
7-Day Trend
Over the next week mold (alternaria) and mold (cladosporium) will increase; cypress, grass, willow, and mugwort will remain stable.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Mold (Alternaria) | None | 0/100 |
| Mold (Cladosporium) | Low | 2/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | None | 0/100 | |
| Mold (Alternaria) | None | 0/100 | |
| Mold (Cladosporium) | Low | 1/100 |
Local Environmental Conditions
The center of Sundsvall is surrounded mainly by woodland, which covers around 53% of the nearby area, with a good deal of built-up land. Common allergenic trees nearby include willow, alder and poplar. Grasses are a major source, with mugwort and pigweed adding to the weed pollen load. Street trees, private gardens and mown lawns add to local pollen in the more built-up surroundings.
The pollen year starts in early spring, when alder flowers. Willow and poplar follow in mid-spring, bringing the main tree pollen peak. Grasses take over in midsummer, with temperatures around 15°C, and their pollen lingers into late summer. Later, mugwort and pigweed keep weed pollen in the air from midsummer into early fall. By mid-fall, as temperatures fall to around 5°C, pollen levels are low again.
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Resource Hub
Sports venues in Sundsvall 1 sports venue
Local events 1 event
Frequently Asked Questions About Pollen in Västernorrland
Is pollen high in Sundsvall right now?
Currently, there is no significant pollen in Sundsvall.
Will pollen levels change in Sundsvall tomorrow?
On 11 October 2026, pollen conditions in Sundsvall will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Sundsvall this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Sundsvall?
On 10 October 2026, there are no significant pollen types in Sundsvall.
When is pollen season in Sundsvall?
How often is the Sundsvall pollen forecast updated?
The Sundsvall pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Sundsvall come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Sundsvall based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Sundsvall, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
