Aloha pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Aloha is medium; grass is medium; oak and ragweed are low. Tomorrow (17 July 2026) levels are similar. Over the following five days grass, oak, and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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Aloha's Washington County Oregon Portland suburban setting features bigleaf maple, red alder, and Douglas fir as the main tree pollen sources, with exposure varying between the wooded residential areas along Beaverton Creek and the more built-up commercial corridors along TV Highway. The Tualatin River floodplain to the south provides locally significant green space, while the wet Pacific oceanic climate provides very frequent rainfall interruptions and the Tualatin Valley's agricultural fringe extends grass pollen throughout summer.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Medium

    33/100

  • Oak (Quercus):

    Low

    13/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    16/100

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 - 17 July

  • 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

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Aloha

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Frequently Asked Questions

Is pollen high in Aloha right now?

On 16 July 2026, overall pollen levels in Aloha are moderate. Grass is the main contributor to airborne pollen, while ambrosia and oak remain at lower levels

Will pollen levels change in Aloha tomorrow?

On 17 July 2026, pollen conditions in Aloha will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Aloha this week?

According to the five-day outlook, ambrosia, artemisia, grass, and oak pollen levels will increase later in the week.

Which pollen types are currently active in Aloha?

On 16 July 2026, Grass is the dominant pollen source in Aloha. ambrosia and oak are also present but at lower levels. artemisia, birch, cypress, willow, and alder are not currently active.

When is pollen season in Aloha?
Aloha's Portland suburban setting in Oregon produces a season opening in January with alder before hazelnut and birch peak through March and April. Grass from surrounding Tualatin Valley farmland peaks through May and June before mugwort extends exposure into September. The wet Pacific oceanic climate provides very frequent rainfall interruptions throughout, while the Tualatin River valley channels airflows through this western Portland suburb.
How often is the Aloha pollen forecast updated?

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

Does pollen in Aloha 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 Aloha 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 Aloha, 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.

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Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Aloha.

For long term forecasts and maps, see the Airmine app

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