Bend pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Bend is high; ragweed is high; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass will increase; mugwort and ragweed will decrease.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| 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) | Low | 18/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 24/100 |
| Ragweed (Ambrosia) | High | 70/100 |
Tomorrow - 21 September
| 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) | Low | 5/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 11/100 | |
| Ragweed (Ambrosia) | High | 59/100 |
Local Environmental Conditions
Bend's parks, including Drake Park and the Deschutes River corridor, feature pine, juniper, and cottonwood as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding high desert and the Cascade Mountain foothills contribute substantial pine, juniper, and grass pollen, while the semi-arid setting and open landscape allow pollen to disperse widely across the city under prevailing westerly winds.
Bend's pollen season opens with juniper from late January, one of the most significant early-season pollen sources in central Oregon. Pine and cottonwood follow through March and April, with grass peaking through May and June. The semi-arid high desert climate and open landscape allow pollen to disperse widely, while the Cascade Mountain foothills contribute additional pine and grass pollen. The dry summer largely suppresses mid-season pollen.
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Resource Hub
Pollen forecast neighborhoods 1 neighborhood
Sports venues in Bend 1 sports venue
Popular Local Routes 1 route
Frequently Asked Questions About Pollen in Oregon
Is pollen high in Bend right now?
On 20 September 2026, overall pollen levels in Bend are high. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Bend tomorrow?
On 21 September 2026, pollen conditions in Bend will be similar to today, with ambrosia at high levels, artemisia at low levels, grass at low levels
Is pollen expected to decrease in Bend this week?
According to the five-day outlook, ambrosia and artemisia pollen levels are expected to gradually decrease, while grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Bend?
On 20 September 2026, Ambrosia is the dominant pollen source in Bend. artemisia and grass are also present but at lower levels.
When is pollen season in Bend?
How often is the Bend pollen forecast updated?
The Bend pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Bend 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 Bend 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 Bend, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
