La Mesa pollen forecast — Helix Charter HS's Baseball Diamond neighborhood

Today (9 August) pollen in Helix Charter HS's Baseball Diamond, La Mesa is medium; mugwort and ragweed are medium; cypress and grass are low. Tomorrow (10 August 2026) levels are similar - grass remains low, mugwort remains medium, ragweed remains medium. Over the following five days cypress, 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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Helix Charter HS's Baseball Diamond sits in the La Mesa suburban landscape of eastern San Diego County, with oak, eucalyptus, and introduced urban trees as the main surrounding pollen sources. Surrounding San Diego inland suburban vegetation and the Navajo Canyon area contribute substantial grass and scrub pollen, while the mild climate advances the season compared to coastal San Diego schools and mugwort extends into September throughout.

Today - 9 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    2/100

  • Grass (Poaceae):

    Low

    12/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Medium

    31/100

  • Ragweed (Ambrosia):

    Medium

    32/100

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

    10/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Medium

    27/100

  • Ragweed (Ambrosia):

    Medium

    30/100

Sports venues in La Mesa

Helix Charter HS's Baseball Diamond

Frequently Asked Questions

Is pollen high in La Mesa right now?

On 9 August 2026, overall pollen levels in La Mesa are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia, cypress, and grass remain at lower levels

Will pollen levels change in La Mesa tomorrow?

On 10 August 2026, pollen conditions in La Mesa will be different from today, with ambrosia at medium levels, artemisia at medium levels, grass at low levels

Is pollen expected to decrease in La Mesa this week?

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

Which pollen types are currently active in La Mesa?

On 9 August 2026, Ambrosia is the dominant pollen source in La Mesa. artemisia, cypress, and grass are also present but at lower levels.

When is pollen season in La Mesa?
Helix Charter HS's Baseball Diamond's pollen season lines up with the rest of La Mesa, starting with olive and acacia in January before eucalyptus takes over and peaks through February. A grass pollen peak follows through March and April; sagebrush and mugwort extend exposure into early autumn. Onshore Pacific breezes periodically clear the air, though inland valleys can still see elevated counts throughout the year.
How often is the La Mesa pollen forecast updated?

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

Does pollen in La Mesa 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 La Mesa 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 La Mesa, 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 Helix Charter HS's Baseball Diamond, La Mesa.

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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.