Pasadena, TX Pollen Count

What is the Pasadena pollen count today?

The Pasadena pollen count today is 25 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.

Short answer for anyone searching pollen count today Pasadena: this page is updated every morning with the day’s modelled reading.

Pasadena allergies today

Pasadena allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 25 (Low), driven mainly by Ragweed. When people ask about Pasadena allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Pasadena.

Allergies in Pasadena follow the Texas calendar set out below — the chapters, the plants behind them, and the 5-day forecast on this page show whether today is typical for the season or an exception to it. If you are checking allergies today in Pasadena before heading outdoors, the split at the top of this page is the part to read: it shows which pollen is doing the work today, not just how high the total sits.

Read the five-day table on this page as the Pasadena allergy forecast: today reads 25 (Low), and the day-by-day outlook shows whether Pasadena allergies are set to ease or build across the week — the days to plan outdoor time around are the ones where the index steps down, not just today.

In practice, the allergy count Pasadena today records is this same combined reading — tree, grass, weed and mold in one index.

The Pasadena allergy count today is 25 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.

Pollen count today Pasadena: the 5-day forecast

Pollen Atlas forecasts Pasadena’s pollen count to peak on Friday at 25 (Low) over the next 5 days.

Pollen by type in Pasadena

• Pasadena tree pollen count
• Pasadena grass pollen count
• Pasadena ragweed pollen count

What is driving Pasadena’s pollen today

The shape of today’s 25 (Low) is set by weed pollen at 28 (Low on its own scale) — about 49% of the four category readings added together, 6 points clear of the next category, tree pollen at 22. A weed-led total is the classic late-year shape: tree and grass pollen have usually receded, leaving weed pollen — and on damp days mold — to make up most of what the index records. Weed pollen leading in November is the Texas calendar working as expected — November falls in the closing weeks of the state’s weed chapter.

Plant-level detail is not in today’s feed for Pasadena, so the drivers have to be read from the category split above. The Texas guide’s account of Texas names mountain cedar — Ashe juniper — in winter, oak in spring and ragweed from August — the pollens behind readings of this shape in this state — and the split shows how much of today’s total each category is actually carrying.

Across the five-day window the Total Pollen Index runs from 11 to 25, never changing band. Today’s 25 sits 4 points above the window’s average of 21 — a moving window, worth reading day by day rather than from the average.

Plants affecting Pasadena now

Detailed plant-by-plant readings for Pasadena were not returned in today\u2019s source data, so this section summarises the pollen types the index above is built from instead of listing individual plants.

Tree pollen is one of the categories with a non-zero reading today, at 22 (Low).

Grass pollen is one of the categories with a non-zero reading today, at 7 (Low).

Weed pollen is one of the categories with a non-zero reading today, at 28 (Low).

In the Gulf & South Texas pattern, the plants that typically shape this city’s year are spring trees, warm-season grasses, late-summer ragweed and winter mountain cedar in the west of the region — named here as regional context only, not as today\u2019s measurements.

Plant detail returns here automatically on any day the source data includes it.

Every pollen type, with photos and seasons: the pollen directory.

Pasadena pollen through the year

Chapter by chapter, the Pasadena pollen year runs like this:

• Mountain cedar runs from December to March in the west of the region, and oak leads the spring.
• Grasses carry the hot months, with mold close behind in the Gulf humidity.
• Ragweed runs from August toward a mild, late finish.
• Outdoor mold stays elevated for much of the year in the Gulf humidity and can co-headline a reading in any month.

The Texas allergy season guide names mountain cedar — Ashe juniper — in winter, oak in spring and ragweed from August. Texas runs four seasons back to back — cedar from December to March, oak and other trees in spring, grasses through summer, ragweed to the first frost — so its true low window is short. Pollen seasons are generally growing longer and more intense across the Northern Hemisphere, research by Ziska and colleagues (2019) found — a trend Texas’s near-year-round calendar already illustrates.

November in Pasadena sits inside the weed chapter of the Texas year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters touch every month of the Texas year — there is no reliably empty month in this calendar. The full calendar is set out in the Texas allergy season guide.

How to read this index

Pollen Atlas reports the Pasadena pollen count on a Total Pollen Index from 0 to 100, built from separate tree, grass and weed readings. The total is a summary, not an average of the three: a single strong category can lift it, and three quiet categories can hold it down even in a month when Pasadena, TX pollen is usually more active. Index values are a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data, with plant detail by the Google Pollen API. The index is a modelled 0–100 scale, not a measured count, and figures update through the day, so a morning and an evening visit to this page can legitimately show different numbers.

Pasadena in today’s national picture

At 25 (Low), Pasadena ranks joint 36055th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Serpa, Portugal at 53, and the lowest is Galiakberovo, Russia at 5. The whole table spans 48 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.

Around Pasadena: Deer Park, TX (3 miles away) reads 24 (Low); South Houston, TX (5 miles away) reads 25 (Low); La Porte, TX (6 miles away) reads 24 (Low). Pasadena reads 1 point higher than its nearest tracked neighbour today. Across Texas’s 1843 tracked cities, today runs from 8 in Rockport to 42 in Gunter.

Pollen totals are population numbers; symptoms are personal. The same reading can leave one Pasadena resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Pasadena, TX can test whether tree, grass, weed or mold is the category that matters for you — the four readings at the top of this page are the starting point for that conversation.

Pasadena in its local area

Pasadena is a city in Harris County, Texas. Its population is 149,345 (ACS 2023).

Across Texas’s 1843 tracked cities, Pasadena ranks joint 480th today.

Like every Pollen Atlas city page, the Pasadena, TX pollen count is refreshed each morning.

Nearby cities

• Deer Park pollen count (3 miles away)
• South Houston pollen count (5 miles away)
• La Porte pollen count (6 miles away)
• Taylor Lake Village pollen count (8 miles away)
• Galena Park pollen count (8 miles away)
• Shoreacres pollen count (8 miles away)

From Pollen Atlas News

• Texas allergy season
• Ragweed season