Little Thompson Valley Pioneer Museum, Berthoud Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Little Thompson Valley Pioneer Museum, Berthoud is low; ragweed, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort and ragweed will increase; mold (alternaria) and mold (cladosporium) will decrease; grass will remain stable.
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Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| 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) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 16/100 |
| Mold (Alternaria) | Low | 20/100 |
| Mold (Cladosporium) | Low | 24/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| 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) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 8/100 | |
| Mold (Alternaria) | Low | 17/100 | |
| Mold (Cladosporium) | Low | 25/100 |
Local Environmental Conditions
Most of the area around this location in Berthoud is built-up land, with some open grassland and woodland. The damp ground beside a stream or river nearby supports trees, shrubs and reeds, adding to local pollen. Allergenic trees nearby include maple. Grass pollen adds noticeably to the overall load. In the immediate area, planted trees and mown lawns are the main sources in the built-up parts.
Maple leads the season in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grasses take over in early summer, with temperatures around 20°C, and their pollen lingers into early fall. A smaller weed peak follows from early summer into early fall. Spring is the wettest time of year, and heavy showers can bring short breaks in pollen. By late fall, pollen levels are low again.
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Frequently Asked Questions About Pollen in Colorado
Is pollen high in Berthoud right now?
On 10 October 2026, overall pollen levels in Berthoud are low. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Berthoud tomorrow?
On 11 October 2026, pollen conditions in Berthoud will be similar to today, with ambrosia at low levels
Is pollen expected to decrease in Berthoud this week?
According to the five-day outlook, artemisia and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Berthoud?
On 10 October 2026, Ambrosia is the dominant pollen source in Berthoud. artemisia and grass are not currently active.
When is pollen season in Berthoud?
How often is the Berthoud pollen forecast updated?
The Berthoud pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Berthoud 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 Berthoud 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 Berthoud, 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).
