Willows pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Willows is high; mugwort is high; cypress, grass, and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort remains high, ragweed remains low. Over the following five days cypress, 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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Willows's setting on flat farmland in California's northern Sacramento Valley supports rice fields, valley oak woodlots, and irrigated orchard rows as the leading local vegetation, all factoring into the pollen count through the year. None of this is unusual for a town with Willows's particular mix of terrain and plant life. The mix of native and introduced species here is fairly typical for this part of the country.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
6/100
-
Grass (Poaceae):
Low
5/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
High
68/100
-
Ragweed (Ambrosia):
Low
20/100
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):
High
52/100
-
Ragweed (Ambrosia):
Low
6/100
Air quality in Willows
View air qualityFrequently Asked Questions
Is pollen high in Willows right now?
On 9 August 2026, overall pollen levels in Willows are high. Artemisia is the main contributor to airborne pollen, while ambrosia, cypress, and grass remain at lower levels
Will pollen levels change in Willows tomorrow?
On 10 August 2026, pollen conditions in Willows will be different from today, with ambrosia at low levels, artemisia at high levels
Is pollen expected to decrease in Willows this week?
According to the five-day outlook, ambrosia, artemisia, cypress, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Willows?
On 9 August 2026, Artemisia is the dominant pollen source in Willows. ambrosia, cypress, and grass are also present but at lower levels.
When is pollen season in Willows?
How often is the Willows pollen forecast updated?
The Willows pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Willows 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 Willows 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 Willows, 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 Willows.
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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.