Salem pollen forecast — Oregon State Capitol neighborhood

Today (9 August) pollen in Oregon State Capitol, Salem is low; mugwort and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort increasing, ragweed increasing, grass at low levels. 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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Salem's typical vegetation carries through to Oregon State Capitol, a capitol building set in a landscaped downtown park, so pollen timing here matches the wider city rather than running on its own schedule. Any difference from the citywide pattern here tends to be minor rather than a distinct microclimate.

Today - 9 August

  • 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):

    Low

    13/100

  • Ragweed (Ambrosia):

    Low

    12/100

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 - 10 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    3/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Medium

    30/100

  • Ragweed (Ambrosia):

    Medium

    31/100

Other Landmarks in Salem

Oregon State Capitol

Frequently Asked Questions

Is pollen high in Salem right now?

On 9 August 2026, overall pollen levels in Salem are low. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels

Will pollen levels change in Salem tomorrow?

On 10 August 2026, pollen conditions in Salem will be different from today, with grass at low levels and ambrosia, artemisia increasing

Is pollen expected to decrease in Salem this week?

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

Which pollen types are currently active in Salem?

On 9 August 2026, Ambrosia is the dominant pollen source in Salem. artemisia are also present but at lower levels. cypress and grass are not currently active.

When is pollen season in Salem?
Oregon State Capitol's pollen season lines up with the rest of Salem, starting with alder and birch in February before maple takes over and peaks through March and April. A grass pollen peak follows through May and June; mugwort and nettle extend exposure into September. Frequent spring rain across the Pacific Northwest periodically clears pollen from the air, moderating peak counts, which shapes conditions at Oregon State Capitol much as it does elsewhere in Salem.
How often is the Salem pollen forecast updated?

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

Does pollen in Salem 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 Salem 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 Salem, 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: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Oregon State Capitol, Salem.

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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.