Colusa pollen forecast - today, tomorrow and the week ahead

Today (30 August) pollen in Colusa 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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Colusa sits on flat rice-farming country along the Sacramento River, where the dominant vegetation is a mix of rice fields, riverside cottonwood, and valley oak woodlots, shaping the local pollen profile across the seasons. This mix of plant life is fairly typical for the wider area around Colusa. Microclimates within the area can shift the timing slightly from one neighborhood to the next.

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

    7/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Moderate

    36/100

  • Ragweed (Ambrosia):

    Moderate

    37/100

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

    15/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Moderate

    40/100

  • Ragweed (Ambrosia):

    Moderate

    45/100

Air quality in Colusa

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Frequently Asked Questions

Is pollen high in Colusa right now?

On 30 August 2026, overall pollen levels in Colusa are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels

Will pollen levels change in Colusa tomorrow?

On 31 August 2026, pollen conditions in Colusa will be similar to today, with grass at low levels, ambrosia at moderate levels, artemisia at moderate levels

Is pollen expected to decrease in Colusa 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 Colusa?

On 30 August 2026, Ambrosia is the dominant pollen source in Colusa. artemisia and grass are also present but at lower levels. cypress are not currently active.

When is pollen season in Colusa?
Colusa's tree pollen season begins with olive and acacia from January with eucalyptus joining in and continuing through February. A grass pollen peak follows through March and April; sagebrush and mugwort extend exposure into early autumn. The Southern California Mediterranean climate advances the season, and onshore Pacific breezes can periodically disperse pollen, shaping conditions across the city.
How often is the Colusa pollen forecast updated?

The Colusa pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in Colusa 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 Colusa 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 Colusa, 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?

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Data provided by Airmine — Last update: 30 August 2026 at 14:32 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Colusa.

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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.