Moreno Valley pollen forecast - today, tomorrow and the week ahead

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

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Moreno Valley's parks, including Lake Perris State Recreation Area and the San Jacinto River corridor, feature oak, sycamore, and introduced eucalyptus as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Inland Empire chaparral and the San Jacinto Mountain foothills contribute substantial grass and scrub pollen under prevailing offshore winds.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    22/100

  • Grass (Poaceae):

    Medium

    30/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    23/100

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

    3/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    None

    0/100

Air quality in Moreno Valley

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Frequently Asked Questions

Is pollen high in Moreno Valley right now?

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

Will pollen levels change in Moreno Valley tomorrow?

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

Is pollen expected to decrease in Moreno Valley this week?

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

Which pollen types are currently active in Moreno Valley?

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

When is pollen season in Moreno Valley?
Moreno Valley's pollen season opens with acacia and native oak from January in the mild Inland Empire climate. Sycamore and grass follow through March and April, with the season peaking earlier than most US cities. The San Jacinto Mountain foothills channel airflows and concentrate pollen, while surrounding Riverside County chaparral contributes substantial scrub pollen under offshore winds. The dry summer largely suppresses mid-season exposure.
How often is the Moreno Valley pollen forecast updated?

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

Does pollen in Moreno Valley 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 Moreno Valley 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 Moreno Valley, 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 Moreno Valley.

For long term forecasts and maps, see the Airmine app

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