Meridian pollen forecast - today, tomorrow and the week ahead

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

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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Meridian's parks, including Julius M. Kleiner Memorial Park and the Boise River corridor, feature cottonwood, birch, and ash as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Idaho high desert farmland and the Snake River Plain contribute substantial grass and sagebrush pollen, while the valley setting channels airflows across the Treasure Valley area.

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

    43/100

  • Oak (Quercus):

    Low

    18/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    19/100

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):

    Low

    18/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Meridian

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Frequently Asked Questions

Is pollen high in Meridian right now?

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

Will pollen levels change in Meridian tomorrow?

On 17 July 2026, pollen conditions in Meridian will be different from today, with grass continuing to decline

Is pollen expected to decrease in Meridian this week?

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

Which pollen types are currently active in Meridian?

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

When is pollen season in Meridian?
Meridian's pollen season opens with cottonwood and birch from late February, followed by ash through March and April. Grass pollen peaks through May and June. The semi-arid high desert climate means fewer rainfall interruptions than in wetter US cities, while surrounding Idaho Snake River Plain farmland contributes substantial grass pollen. The Treasure Valley setting can concentrate pollen under calm spring conditions and temperature inversions.
How often is the Meridian pollen forecast updated?

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

Does pollen in Meridian 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 Meridian 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 Meridian, 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: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Meridian.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

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