League City pollen forecast - today, tomorrow and the week ahead

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

On 17 July 2026, pollen conditions in League City will be similar to today, with ambrosia at low levels, grass at low levels

According to the five-day outlook, ambrosia 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 League City. grass are also present but at lower levels. oak, willow, alder, artemisia, birch, and cypress are not currently active.

League City's pollen season opens with cedar and oak from late January in the mild Gulf Coast climate. Grass pollen follows through March and April, with ragweed extending the season into October. The flat, low-lying Galveston Bay area landscape allows pollen to disperse readily, while surrounding Gulf Coast prairie and the Clear Creek corridor contribute substantial grass and crop pollen under prevailing southerly winds.

The League City 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 League City, 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.