San Antonio pollen forecast — Pearl District San Antonio neighborhood

On 16 July 2026, overall pollen levels in San Antonio are low. Ambrosia is the main contributor to airborne pollen, while cypress and grass remain at lower levels

On 17 July 2026, pollen conditions in San Antonio will be similar to today, with ambrosia at low levels, cypress at low levels, grass at low levels

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

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

The pollen season at Pearl District San Antonio mirrors San Antonio overall, starting with mountain cedar in December before oak and elm peaks during March. Grass pollen then peaks through April and May, and a long ragweed tail continues into October. Mountain cedar's December-through-February peak is one of the most intense tree pollen events in the US, consistent with the wider San Antonio area.

The San Antonio 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 San Antonio, 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.