Hønefoss pollen forecast - today, tomorrow and the week ahead

On 16 July 2026, overall pollen levels in Hønefoss are moderate. Cypress is the main contributor to airborne pollen, while grass remain at lower levels

On 17 July 2026, pollen conditions in Hønefoss will be different from today, with cypress, grass continuing to decline

According to the five-day outlook, artemisia, cypress, and grass pollen levels will increase later in the week.

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

Hønefoss's seasonal pollen activity runs from February through August, led in by alder and hazel in February, before the season's main birch surge arrives which carries through May. Grass follows close behind over June and July. With the sheltered valleys and farmland typical of this part of eastern Norway, the local climate shapes a season that runs a little differently than the Norwegian average.

The Hønefoss 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 Hønefoss, 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.