Allergy Seasons
in Central Texas
A month-by-month breakdown of what's in the air in Waco, from cedar fever in January to ragweed in September. Know what's coming so you can stay ahead of it.
Waco Pollen, Count by Count
The calendar above is the typical year. This is the record of what we actually measured. Every count we have published since January 2023, grouped by month, so you can see how each season really ran.
Each bar is the highest count recorded in that month. A flat grey bar means no count was taken. Trees, grass and weeds are counted in grains per cubic metre, mold in spores per cubic metre.
Pollen counts will appear here as soon as the first reading is published.
What Peaks When
Trees, grasses, weeds, and year-round triggers all move through one continuous cycle here in Central Texas. This keeps the page reading like one system with clear headers for each part.
Trees
Trees dominate the Central Texas allergy calendar from December through June. Cedar opens the cycle in winter, then oak, mulberry, pecan, and other spring trees keep symptoms going well into early summer.
Grasses
Grasses take over from spring into summer. Unlike tree pollen, grass exposure is everywhere in Central Texas, from lawns and sports fields to roadsides and open lots.
Weeds
After the brief midsummer lull, weed pollen drives late summer and fall symptoms. Ragweed leads the charge, but several other weeds extend that second allergy season across Central Texas.
All Year
These triggers do not wait for a season change. They stay in the background every month and often make spring or fall flares feel even worse.
Mold spores thrive in warm, humid conditions, which Central Texas has plenty of. Indoor mold stays active year-round, while outdoor mold spikes after rain and through the warm months.
Dust mites live in bedding, carpet, and upholstery. They peak in warm humid weather, but they never fully disappear, which is why symptoms often feel constant indoors.
Pet dander is a constant indoor exposure. If you are sensitive, symptoms do not wait for a pollen season, and residue can linger in a home long after a pet leaves.
Know What You're Actually Reacting To.
Comprehensive allergy testing tells you exactly which allergens affect you, so you are not guessing through every season. Board-certified allergists serving Waco for more than 45 years.