Julian pollen forecast - today, tomorrow and the week ahead

Currently, there is no significant pollen in Julian.

On 17 July 2026, pollen conditions in Julian will be similar to today with no significant pollen expected.

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

On 16 July 2026, there are no significant pollen types in Julian.

Julian sees its pollen season open with olive and acacia from January with eucalyptus taking the lead through February. Grass follows, peaking through March and April, while sagebrush and mugwort extend exposure into early autumn. The Southern California Mediterranean climate advances the season, and onshore Pacific breezes can periodically disperse pollen throughout the year.

The Julian 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 Julian, 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.