Pollen today
Loading today’s values…
Elm pollen is very low in Houston today.
Grass and weed pollen are very low. Elm pollen should stay very low through Saturday.
Today in Houston, TexasTuesday, November 3
Tree1Very lowElm
Grass1Very lowGrasses
Weed1Very lowRagweed
Next four days, highest level each day:
Wed2Low
Thu1Very low
Fri2Low
Sat2Low
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Plant by plant
Google’s index for each plant it models in Houston today. A plant out of season has no index.
Plants in HoustonTuesday, November 3
Elm1Very low
Grasses1Very low
Ragweed1Very low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in Houston
The forecast that moves pollen around, and the air beside it.
Weather forecast
- This Afternoon
- Showers And Thunderstorms. High 82 °F. Wind W 5 to 10 mph. 79% chance of precipitation.
- Tonight
- Partly Cloudy. Low 59 °F. Wind NW 5 mph. 15% chance of precipitation.
Forecast: National Weather Service, updated 10:26 am CT.
Pollen alerts for Houston by email
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Houston’s year in pollen
Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for Houston began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
Tree
Grass
Weed
0 None1 Very low2 Low3 Moderate4 High5 Very highThis weekNot recorded
See it as a table
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 28 to Nov 3 | 1 Very low | 1 Very low | 2 Low |
| Oct 21 to Oct 27 | 1 Very low | 2 Low | 2 Low |
| Oct 14 to Oct 20 | 2 Low | 3 Moderate | 3 Moderate |
Source: Includes pollen data from GoogleIncludes data from Google Maps
Beyond today’s pollen
What this forecast doesn’t measure, and when to get help.
No mold level
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Houston on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
No indoor allergens
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
Asthma in Houston
An estimated 9.4% of adults in the city of Houston have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 8.4% to 10.5%). It is a statistical estimate from national survey data, not a count.
Allergists in the Houston area
111 allergists enrolled in Medicare practice in the Houston area: 1.40 for every 100,000 people, more than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the Houston area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
Houston’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
A typical year at Houston’s Intercontinental Airport brings about 300 days between the last spring freeze and the first fall freeze, so plants here have most of the year to grow.1 Winters average about 56 °F, and close to 52 inches of rain and other precipitation falls in an average year.1 The Houston Health Department collects pollen and mold spores 24 hours a day with a spore trap on the roof of its laboratory.2
Live oak, a tree of the Southeast’s lower Coastal Plain whose range reaches west to southern and central Texas, flowers every spring from March through May.3 On April 8, 2024, oak led the tree pollen in the department’s count, ahead of pecan and hickory and hackberry, and grass pollen rated heavy.4 On October 4, 2023, by contrast, ragweed was the only pollen in the count, at a medium level.5
Sources
- U.S. Climate Normals 1991–2020: Houston Intercontinental Airport (USW00012960). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- Houston Pollen and Mold Count, Monday, September 22, 2025. Houston Health Department. Read on October 15, 2026.
- Live oak, Silvics of North America. USDA Forest Service. Read on October 15, 2026.
- Houston Pollen and Mold Count, Monday, April 8, 2024. Houston Health Department. Read on October 15, 2026.
- Houston Pollen and Mold Count, Wednesday, October 4, 2023. Houston Health Department. Read on October 15, 2026.
Questions about pollen in Houston
Answered from the values on this page.
Is pollen high in Houston today?
No. The highest level in Houston today, Tuesday, November 3, is very low (1 on the 0 to 5 index), led by elm pollen. Tree pollen is very low, grass pollen is very low and weed pollen is very low.
Which pollen is in the air in Houston today?
According to Google’s model: Elm (very low), grasses (very low) and ragweed (very low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in Houston?
Yes. Google’s forecast for tomorrow, Wednesday, is low (2 on the 0 to 5 index), up from today’s very low. Over the next four days, the highest forecast is low, on Wednesday.
Is this a pollen count?
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Houston. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
When does this page update?
Twice a day. We fetch new values soon after midnight in Houston, so each day starts with its own values, and again after Google’s daily model run, usually by about 9:30 am CT. Each section shows when its values were retrieved.
How long has AllergyNest recorded pollen in Houston?
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps