Houston Pollen Count Today
Houston, TX · Thursday, July 23, 2026
TreesNone
0 grains/m³
GrassMedium
12 grains/m³
WeedsMedium
44 grains/m³
MoldHeavy
15,873 spores/m³
Pollen: Medium. Mold: Heavy.
Last 60 reporting days
Full trends →Trees
210
May 27Jun 12Jul 6Jul 23
Grass
20100
May 27Jun 12Jul 6Jul 23
Weeds
100500
May 27Jun 12Jul 6Jul 23
Mold
20,00010,0000
May 27Jun 12Jul 6Jul 23
Past year
Trees
5,0002,5000
Jul 23Nov 19Mar 24Jul 23
Grass
50250
Jul 23Nov 19Mar 24Jul 23
Weeds
2,0001,0000
Jul 23Nov 19Mar 24Jul 23
Mold
50,00025,0000
Jul 23Nov 19Mar 24Jul 23
Top allergens today
Pollen
| Other Weed | 30 |
| Sedge (Cyperaceae) | 4 |
| Plantain (Plantago) | 4 |
| Cattail (Typha) | 4 |
| Amaranth (Chenopodiaceae/ Amaranthaceae) | 2 |
Mold
| Ascospores | 6,907 |
| Cladosporium | 5,254 |
| Basidiomycetes | 1,810 |
| Penicillium/Aspergillus | 494 |
| Cercospora | 356 |
Explore Houston's pollen & mold
Full daily reportEvery type, with the species breakdownTree & grass pollenOak, pecan, cedar & grassWeed pollenRagweed & other fall triggersMold countOutdoor spore levelsAllergen directoryEvery pollen & mold trackedTrends & seasonWhen pollen is worst in HoustonCedar feverWinter mountain-cedar seasonRagweed seasonWhen it starts, peaks & ends
About these counts
HoustonPollen.com publishes the actual pollen and mold counts measured by the Houston Health Department — not a forecast model. Counts cover tree, grass and weed pollen plus mold spores, with a species-level breakdown, and are released on weekdays (excluding City of Houston holidays). See the full report,trends, or how the scale works.