Los Angeles pollen forecast — Los Angeles Country Club – North Course neighborhood

On 20 July 2026, overall pollen levels in Los Angeles are low. Ambrosia is the main contributor to airborne pollen, while cypress and grass remain at lower levels

On 21 July 2026, pollen conditions in Los Angeles will be similar to today, with ambrosia at low levels, cypress at low levels, grass at low levels

According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, while ambrosia pollen will increase, suggesting mixed conditions later in the week.

On 20 July 2026, Ambrosia is the dominant pollen source in Los Angeles. cypress and grass are also present but at lower levels. willow, alder, artemisia, birch, and oak are not currently active.

Los Angeles's regional pollen pattern holds at Los Angeles Country Club – North Course, with olive and acacia first appearing in January with eucalyptus joining in and continuing through February. Grass pollen then peaks through March and April, and sagebrush and mugwort extend exposure into early autumn. Onshore Pacific breezes periodically clear the air, though inland valleys can still see elevated counts.

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

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.

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 Los Angeles, 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.