Nampa pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Nampa 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 decrease. 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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Nampa's parks, including Lakeview 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 and concentrates pollen 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

    37/100

  • Oak (Quercus):

    Low

    9/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    9/100

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):

    Medium

    46/100

  • Oak (Quercus):

    Low

    19/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    19/100

Air quality in Nampa

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Frequently Asked Questions

Is pollen high in Nampa right now?

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

Will pollen levels change in Nampa tomorrow?

On 17 July 2026, pollen conditions in Nampa will be similar to today, with oak at low levels, ambrosia at low levels, grass at medium levels

Is pollen expected to decrease in Nampa this week?

According to the five-day outlook, oak, ambrosia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

Which pollen types are currently active in Nampa?

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

When is pollen season in Nampa?
Nampa'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 Nampa pollen forecast updated?

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

Does pollen in Nampa 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 Nampa 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 Nampa, 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 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Nampa.

For long term forecasts and maps, see the Airmine app

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