Guadalajara pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Guadalajara is low; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass and mugwort will decrease; cypress and willow 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) | Low | 11/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 11/100 |
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) | Low | 10/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Low | 10/100 |
Local Environmental Conditions
Guadalajara's Parque de la Concordia and the Henares River corridor feature poplar, ash, and pine as the main tree pollen sources, with exposure varying between these green areas and the more built-up 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 the spring season.
Guadalajara's pollen season opens in February with hazel and poplar before ash from the Henares valley peaks through March and April. Grass from surrounding Castilian farmland peaks strongly through May and June. The dry continental climate concentrates pollen during spring, while the flat, open Meseta landscape allows pollen to disperse widely and the summer heat ends the season abruptly.
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Frequently Asked Questions About Pollen in Castile-La Mancha
Is pollen high in Guadalajara right now?
On 20 September 2026, overall pollen levels in Guadalajara are low. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Guadalajara tomorrow?
On 21 September 2026, pollen conditions in Guadalajara will be similar to today, with artemisia at low levels, grass at low levels
Is pollen expected to decrease in Guadalajara this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Guadalajara?
On 20 September 2026, Artemisia is the dominant pollen source in Guadalajara. grass are also present but at lower levels. cypress and willow are not currently active.
When is pollen season in Guadalajara?
How often is the Guadalajara pollen forecast updated?
The Guadalajara pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Guadalajara 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 Guadalajara 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 Guadalajara, 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).
