Alcalá de Henares pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Alcalá de Henares is medium; grass is medium. Tomorrow (26 June 2026) levels are similar. Over the following five days grass will increase. 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
Alcalá de Henares' Henares River corridor and the Universidad verde campus feature oak, ash, and poplar as the main tree pollen sources, with exposure varying between these green areas and the more built-up historic city centre. Surrounding Castilian farmland and the flat, open Meseta landscape contribute substantial grass and crop pollen, while the semi-arid continental climate concentrates pollen dispersal during spring.
Today - 25 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Medium
32/100
-
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):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Medium
46/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Alcalá de Henares right now?
On 25 June 2026, overall pollen levels in Alcalá de Henares are moderate. Grass is the main contributor to airborne pollen
Will pollen levels change in Alcalá de Henares tomorrow?
On 26 June 2026, pollen conditions in Alcalá de Henares will be similar to today, with grass at medium levels
Is pollen expected to decrease in Alcalá de Henares this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Alcalá de Henares?
On 25 June 2026, Grass is the dominant pollen source in Alcalá de Henares. hazel, cypress, willow, alder, and birch are not currently active.
When is pollen season in Alcalá de Henares?
How often is the Alcalá de Henares pollen forecast updated?
The Alcalá de Henares pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Alcalá de Henares 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 Alcalá de Henares 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 Alcalá de Henares, 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 Spain?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 25 Jun 2026, 09:01 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Alcalá de Henares.
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.