Houston Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Houston is high; ragweed is high; grass, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) ragweed remains high, mold (alternaria) remains low, mold (cladosporium) remains low, grass increasing, mugwort at low levels.
7-Day Trend
Over the next week mugwort, ragweed, and mold (cladosporium) will increase; grass and mold (alternaria) will decrease.
Explore Forecasts
Air Quality & Mold
Pollen for Neighborhoods
Pollen & AQ for Routes
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 25/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | High | 57/100 |
| Mold (Alternaria) | Low | 16/100 |
| Mold (Cladosporium) | Low | 20/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | Moderate | 32/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 1/100 | |
| Ragweed (Ambrosia) | High | 64/100 | |
| Mold (Alternaria) | Low | 15/100 | |
| Mold (Cladosporium) | Low | 18/100 |
Local Environmental Conditions
Most of the area around the center of Houston is built-up land, with a good deal of woodland. Oak heads the list of allergenic trees nearby, ahead of plane tree. Grass pollen is significant here, and ragweed and plantain contribute weed pollen. Compared with most places, ragweed is especially widespread here, which makes it one of the key local allergens.
Tree pollen peaks in early spring, when the weather warms to around 20°C and oak and plane tree are in full flower. Then come the grasses, strongest in mid-spring and fading by mid-fall. The most intense period comes from late summer into mid-fall, when ragweed and plantain are in flower. Rain is heaviest in spring, often giving short breaks from high pollen levels.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Resource Hub
Pollen forecast neighborhoods 100 neighborhoods
Sports venues in Houston 4 sports venues
Local parkruns 3 parkruns
Local events 1 event
Frequently Asked Questions About Pollen in Texas
Is pollen high in Houston right now?
On 10 October 2026, overall pollen levels in Houston are high. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Houston tomorrow?
On 11 October 2026, pollen conditions in Houston will be different from today, with ambrosia at high levels, artemisia at low levels and grass increasing
Is pollen expected to decrease in Houston this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, while ambrosia and artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Houston?
On 10 October 2026, Ambrosia is the dominant pollen source in Houston. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Houston?
How often is the Houston pollen forecast updated?
The Houston pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Houston come from nearby or far away?
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.
Are pollen levels in Houston based on measurements or forecasts?
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 Houston, 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.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
