Järfälla pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Järfälla are high. Grass is the main contributor to airborne pollen, while cypress and artemisia remain at lower levels

On 17 July 2026, pollen conditions in Järfälla will be different from today, with cypress at medium levels and grass continuing to decline

According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, while artemisia pollen will increase, suggesting mixed conditions later in the week.

On 16 July 2026, Grass is the dominant pollen source in Järfälla. cypress and artemisia are also present but at lower levels. alder, birch, hazel, and willow are not currently active.

The pollen calendar in Järfälla starts in February with alder, followed by a strong birch peak in May. Grass pollen then dominates for several weeks in June and July before gradually easing. Järfälla's location relative to the Mälaren bay shoreline means daily pollen readings can swing with changes in wind direction. What keeps the season going into August here is largely the surrounding spruce forest and open agricultural land.

The Järfälla pollen forecast is updated four times daily. See the timestamp below for the most recent update.

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.

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 Järfälla, 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.