Porterville pollen forecast - today, tomorrow and the week ahead
Today (30 August) pollen in Porterville is moderate; mugwort and ragweed are moderate; grass is low. Tomorrow (31 August 2026) levels are similar. Over the following five days grass, mugwort, and ragweed will increase. 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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Porterville's Sierra Nevada foothill setting features blue oak, gray pine, and chaparral scrub as the main tree pollen sources, with exposure varying between the foothill woodland and chaparral residential areas and the more built-up commercial corridors along Highway 65. The Tule River corridor provides locally significant green space, while the transition from valley agricultural land to foothill woodland creates distinct pollen zones across the city.
Today - 30 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
5/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Moderate
27/100
-
Ragweed (Ambrosia):
Moderate
38/100
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 - 31 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
8/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Moderate
26/100
-
Ragweed (Ambrosia):
Moderate
41/100
Air quality in Porterville
View air qualityFrequently Asked Questions
Is pollen high in Porterville right now?
On 30 August 2026, overall pollen levels in Porterville are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Porterville tomorrow?
On 31 August 2026, pollen conditions in Porterville will be similar to today, with ambrosia at moderate levels, artemisia at moderate levels, grass at low levels
Is pollen expected to decrease in Porterville this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Porterville?
On 30 August 2026, Ambrosia is the dominant pollen source in Porterville. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in Porterville?
How often is the Porterville pollen forecast updated?
The Porterville pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Porterville 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 Porterville 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 Porterville, 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: 30 August 2026 at 08:36 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Porterville.
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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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.