Hacienda Heights pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Hacienda Heights is medium; mugwort and ragweed are medium; cypress and grass are low. Tomorrow (10 August 2026) levels are similar - ragweed remains medium, mugwort declining. Over the following five days grass, mugwort, and ragweed will increase; cypress will remain stable. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Hacienda Heights's San Gabriel Valley unincorporated Los Angeles County hillside setting features olive, avocado, and toyon as the main tree pollen sources, with exposure varying between the hillside chaparral residential areas and the more built-up valley floor commercial corridors along Hacienda Boulevard. The Puente Hills hillside setting creates distinct upslope-downslope pollen gradients, while the avocado orchards on the higher slopes contribute distinctive agricultural tree pollen not found in most Southern California communities.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
3/100
-
Grass (Poaceae):
Low
5/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
31/100
-
Ragweed (Ambrosia):
Medium
30/100
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 - 10 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
25/100
-
Ragweed (Ambrosia):
Medium
26/100
Air quality in Hacienda Heights
View air qualityFrequently Asked Questions
Is pollen high in Hacienda Heights right now?
On 9 August 2026, overall pollen levels in Hacienda Heights are moderate. Artemisia is the main contributor to airborne pollen, while ambrosia, cypress, and grass remain at lower levels
Will pollen levels change in Hacienda Heights tomorrow?
On 10 August 2026, pollen conditions in Hacienda Heights will be different from today, with ambrosia at medium levels and artemisia continuing to decline
Is pollen expected to decrease in Hacienda Heights this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Hacienda Heights?
On 9 August 2026, Artemisia is the dominant pollen source in Hacienda Heights. ambrosia, cypress, and grass are also present but at lower levels.
When is pollen season in Hacienda Heights?
How often is the Hacienda Heights pollen forecast updated?
The Hacienda Heights pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Hacienda Heights 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 Hacienda Heights 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 Hacienda Heights, 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 United States?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Hacienda Heights.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.