Yreka pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Yreka is low; mugwort and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort increasing, ragweed increasing, grass at low levels. 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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Yreka's setting on the Shasta Valley in the Klamath Mountains foothills supports ponderosa pine, oak woodland, and farmland grasses as the leading local vegetation, all factoring into the pollen count through the year. Local parks and open ground tend to see higher pollen counts than the denser urban core. As with most of the region, counts tend to build gradually rather than spike overnight.
Today - 9 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
11/100
-
Ragweed (Ambrosia):
Low
7/100
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):
Low
11/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
46/100
-
Ragweed (Ambrosia):
Medium
37/100
Air quality in Yreka
View air qualityFrequently Asked Questions
Is pollen high in Yreka right now?
On 9 August 2026, overall pollen levels in Yreka are low. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in Yreka tomorrow?
On 10 August 2026, pollen conditions in Yreka will be different from today, with grass at low levels and ambrosia, artemisia increasing
Is pollen expected to decrease in Yreka 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 Yreka?
On 9 August 2026, Ambrosia is the dominant pollen source in Yreka. artemisia are also present but at lower levels. cypress and grass are not currently active.
When is pollen season in Yreka?
How often is the Yreka pollen forecast updated?
The Yreka pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Yreka 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 Yreka 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 Yreka, 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 Yreka.
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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.