Tracy pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Tracy is high; mugwort is high; ragweed is medium; cypress and grass are low. Tomorrow (10 August 2026) levels are similar - mugwort declining, ragweed 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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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Tracy's parks and the San Joaquin Delta waterways feature oak, ash, and walnut as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Central Valley farmland and grasslands contribute substantial grass and crop pollen, while prevailing westerly winds channel marine air through the Altamont Pass and can periodically moderate pollen levels.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
15/100
-
Grass (Poaceae):
Low
15/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
60/100
-
Ragweed (Ambrosia):
Medium
34/100
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):
Medium
39/100
-
Ragweed (Ambrosia):
Low
15/100
Air quality in Tracy
View air qualityPollen forecast for neighborhoods and landmarks in Tracy
Frequently Asked Questions
Is pollen high in Tracy right now?
On 9 August 2026, overall pollen levels in Tracy are high. Artemisia is the main contributor to airborne pollen, while ambrosia, grass, and cypress remain at lower levels
Will pollen levels change in Tracy tomorrow?
On 10 August 2026, pollen conditions in Tracy will be different from today, with ambrosia, artemisia continuing to decline
Is pollen expected to decrease in Tracy this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Tracy?
On 9 August 2026, Artemisia is the dominant pollen source in Tracy. ambrosia, grass, and cypress are also present but at lower levels.
When is pollen season in Tracy?
How often is the Tracy pollen forecast updated?
The Tracy pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Tracy 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 Tracy 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 Tracy, 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: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Tracy.
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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.