Harlingen pollen forecast - today, tomorrow and the week ahead

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

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

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

On 9 August 2026, Ambrosia is the dominant pollen source in Harlingen. artemisia are also present but at lower levels. grass and cypress are not currently active.

Harlingen's subtropical setting in the Rio Grande Valley produces a near year-round pollen season, with palm, mesquite, and introduced ash contributing through winter and spring. Grass pollen peaks through spring and early summer, while Gulf breezes from the nearby coast can periodically disperse pollen. The flat, open South Texas coastal landscape allows pollen from surrounding brush country and agricultural land to move readily across the city.

The Harlingen 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 Harlingen, 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.