Hønefoss pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Hønefoss is medium; cypress is medium; birch and grass are low. Tomorrow (26 June 2026) levels are similar - birch remains low, cypress increasing, grass increasing. Over the following five days birch, cypress, and grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Hønefoss is a small Buskerud town in Ringerike municipality at the confluence of the Begna and Randselva rivers where birch, hazel, and riverside woodland are the main local pollen sources. The river valley concentrates pollen under calm conditions, while the inland continental Buskerud climate produces a well-defined seasonal progression with birch peaking through April and May before grass contributes through June and July and mugwort extends into September.
Today - 25 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
Low
1/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Medium
43/100
-
Grass (Poaceae):
Low
24/100
-
Willow (Salicaceae):
None
0/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 26 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
Low
10/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
High
52/100
-
Grass (Poaceae):
Medium
34/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Hønefoss right now?
On 25 June 2026, overall pollen levels in Hønefoss are moderate. Cypress is the main contributor to airborne pollen, while birch and grass remain at lower levels
Will pollen levels change in Hønefoss tomorrow?
On 26 June 2026, pollen conditions in Hønefoss will be different from today, with birch at low levels and cypress, grass increasing
Is pollen expected to decrease in Hønefoss this week?
According to the five-day outlook, birch, cypress, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Hønefoss?
On 25 June 2026, Cypress is the dominant pollen source in Hønefoss. birch and grass are also present but at lower levels. alder, hazel, and willow are not currently active.
How often is the Hønefoss pollen forecast updated?
The Hønefoss pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hønefoss 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 Hønefoss 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 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.
Want to see pollen forecasts for other cities in Norway?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 25 Jun 2026, 09:00 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Hønefoss.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.