Roa pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Roa is none
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, willow, and mugwort will remain stable.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| 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 |
Tomorrow - 21 September
| 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 |
Local Environmental Conditions
Roa is a small Akershus village in Lunner municipality on the Hadeland plateau where birch, hazel, and farmland edge woodland are the main local pollen sources. The relatively open Hadeland landscape allows pollen to disperse, while the inland continental climate produces a well-defined seasonal progression with birch peaking through April and May before grass from surrounding Hadeland farmland contributes through June and July and mugwort extends into September throughout.
Pollen in Roa typically lasts from February through August, starting with alder and hazel pollen picking up from February, before birch surges to its highest levels that holds through May. Grass takes over from there and holds through June and July. With the relatively mild climate around the inner Oslofjord, the local climate tends to keep the pollen season fairly predictable from year to year.
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Frequently Asked Questions About Pollen in Akershus
Is pollen high in Roa right now?
Currently, there is no significant pollen in Roa.
Will pollen levels change in Roa tomorrow?
On 21 September 2026, pollen conditions in Roa will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Roa this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Roa?
On 20 September 2026, there are no significant pollen types in Roa.
When is pollen season in Roa?
How often is the Roa pollen forecast updated?
The Roa pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Roa 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 Roa 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 Roa, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
