Boulder Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (7 October) pollen in Boulder is moderate; acacia, cypress, eucalyptus, grass, and mold (cladosporium) are moderate; mold (alternaria) is low.
Pollen Tomorrow
Tomorrow (8 October 2026) mold (alternaria) remains low, mold (cladosporium) remains moderate, acacia no longer expected, cypress no longer expected, eucalyptus no longer expected, grass no longer expected.
7-Day Trend
Over the next week acacia, cypress, eucalyptus, grass, mold (alternaria), and mold (cladosporium) will increase.
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Pollen Risk
Today - 7 October
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Moderate | 35/100 |
| Cypress (Cupressaceae) | Moderate | 33/100 |
| Eucalyptus (Myrtaceae) | Moderate | 28/100 |
| Grass (Poaceae) | Moderate | 30/100 |
| Alternaria | Low | 21/100 |
| Cladosporium | Moderate | 28/100 |
Tomorrow - 8 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | None | 0/100 | |
| Cypress (Cupressaceae) | None | 0/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Alternaria | Low | 16/100 | |
| Cladosporium | Moderate | 26/100 |
Local Environmental Conditions
Around 51% of the area near the center of Boulder is open grassland, with a good deal of built-up land. Running water nearby means riverside vegetation is part of the local pollen picture. Grasses also feature strongly, alongside pigweed among the weeds. In the built-up parts of the area, street trees, gardens and park lawns add to the local mix.
Grasses take over in mid-spring, with temperatures around 20°C, and their pollen lingers into early fall. Later, pigweed keeps weed pollen in the air from early summer into early fall. In this dry climate, pollen can linger in the air for long spells without rain. Weather shapes each of these periods: dry, windy spells drive levels up, and showers wash pollen out of the air.
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Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Boulder right now?
On 7 October 2026, overall pollen levels in Boulder are moderate. Grass is the main contributor to airborne pollen, while acacia, cypress, and myrtle remain at lower levels
Will pollen levels change in Boulder tomorrow?
On 8 October 2026, pollen conditions in Boulder will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Boulder this week?
According to the five-day outlook, grass, acacia, cypress, and myrtle pollen levels will increase later in the week.
Which pollen types are currently active in Boulder?
On 7 October 2026, Grass is the dominant pollen source in Boulder. acacia, cypress, and myrtle are also present but at lower levels.
When is pollen season in Boulder?
How often is the Boulder pollen forecast updated?
The Boulder pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Boulder 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 Boulder 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 Boulder, 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.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
