Castellar del Vallès, Spain Pollen Count Today
Castellar del Vallès, Spain · Updated Saturday, November 7, 2026
Pollen Overview
Today's overall pollen level and the dominant type (trees, weeds, grass, or mold).
Total Pollen Index
The combined pollen level across all types (0–100).
Castellar del Vallès, Spain
Weeds Index
How active weeds pollen is today (0–100).
Castellar del Vallès, Spain
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Castellar del Vallès Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Castellar del Vallès residents check each morning
The Castellar del Vallès pollen count today is 20 (Low). The main driver is Ragweed, with weed pollen at 21 today. Tree pollen is the highest single category in the split at 23 (Low), ahead of weed pollen at 21 and grass pollen at 2. Below, the plant detail and the multi-day outlook show whether today is the pattern or the exception. Pollen Atlas updated this count on Saturday, November 7, 2026.
A Low band on the Pollen Atlas index means the Total Pollen Index has stayed in the lower part of the 0–100 scale. Readings in this band are built from low individual category values rather than from one large spike, and the category split above matters more than the headline number: a low total can still contain one category, such as tree pollen, reading noticeably higher than the rest, which is why the split is printed on every Castellar del Vallès page.
Fall is ragweed season across most of the United States: ragweed plants release pollen from late summer into autumn, and weed pollen is typically the last major outdoor pollen category to fade as the weather cools. That pattern is why an autumn total is so often weed-led even when the headline number is low — tree and grass pollen have usually receded by then, leaving weed pollen, and on damp days mold, to make up most of what the index records.
To see whether today’s pollen level holds, check the 5-day Castellar del Vallès pollen forecast below — it is currently mixed, with Tuesday the highest day in the window.
This is the pollen count Castellar del Vallès residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Castellar del Vallès pollen count today?
The Castellar del Vallès pollen count today is 20 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today Castellar del Vallès: this page is updated every morning with the day’s modelled reading.
Castellar del Vallès allergies today
Castellar del Vallès allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 20 (Low), driven mainly by Ragweed. When people ask about Castellar del Vallès allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Castellar del Vallès.
Allergies in Castellar del Vallès follow the Spain 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 Castellar del Vallès 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 Castellar del Vallès allergy forecast: today reads 20 (Low), and the day-by-day outlook shows whether Castellar del Vallès 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 Castellar del Vallès today records is this same combined reading — tree, grass, weed and mold in one index.
The Castellar del Vallès allergy count today is 20 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Castellar del Vallès: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 20 | Low |
| Sunday, November 8 | 20 | Low |
| Monday, November 9 | 20 | Low |
| Tuesday, November 10 | 21 | Low |
| Wednesday, November 11 | 8 | Low |
Pollen Atlas forecasts Castellar del Vallès’s pollen count to peak on Tuesday at 21 (Low) over the next 5 days.
Pollen by type in Castellar del Vallès
What is driving Castellar del Vallès’s pollen today
The shape of today’s 20 (Low) is set by tree pollen at 23 (Low on its own scale) — about 50% of the four category readings added together, 2 points clear of the next category, weed pollen at 21. Tree readings are the fastest-moving of the four in their season, because species pollinate in sequence — a tree-led total can change character within a week. Tree pollen leading in November runs against the usual calendar — the Spain tree chapter runs January to May — so today’s lead is the model outranking the pattern, and this page reports the modelled reading first.
Plant-level detail is not in today’s feed for Castellar del Vallès, so the drivers have to be read from the category split above — it shows how much of today’s total each category is actually carrying, and plant detail returns here automatically on any day the feed includes it.
Across the five-day window the Total Pollen Index runs from 8 to 21, never changing band. Today’s 20 sits 2 points above the window’s average of 17.8 — a moving window, worth reading day by day rather than from the average.
Plants affecting Castellar del Vallès now
Detailed plant-by-plant readings for Castellar del Vallès 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 23 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 2 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 21 (Low).
In the Mediterranean pattern, the plants that typically shape this city’s year are winter cypress and early hazel, spring grasses and olive, and late-summer weeds spread across a long, mild season — 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.
Castellar del Vallès pollen through the year
Three chapters make the Spain pollen year, and Castellar del Vallès follows them in the Mediterranean order. The tree chapter: cypress opens the year in winter, hazel and alder follow early, and olive carries the spring peak from April into May. The grass chapter: grasses build from spring and peak from April into June, earlier in the south. The weed chapter: weeds — pellitory through the warm months and ragweed in late summer where it has spread — close a long season that can run into November.
No Spain allergy season guide is published yet, so this page does not single out signature pollens for Castellar del Vallès — the calendar above is the Mediterranean regional pattern, and the plant detail on this page names what today’s feed actually records.
November in Castellar del Vallès sits inside the weed chapter of the Spain year, in its closing weeks — the part of the calendar today’s readings should be judged against. Between them, the three chapters cover 10 months of the Spain year, January to November — a long season by national standards, with only a short quiet gap. No Spain allergy season guide is published yet — this calendar follows the Mediterranean regional pattern. See Castellar del Vallès pollen count rankings and Castellar del Vallès on the pollen heatmap.
How to read this index
Pollen Atlas reports the Castellar del Vallès 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 Castellar del Vallès, Spain 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.
Castellar del Vallès in today’s national picture
At 20 (Low), Castellar del Vallès ranks joint 50955th of the 90896 cities Pollen Atlas tracks today — in the middle of the national table. The highest reading in the country today is Beja, Portugal at 52, and the lowest is Los Ángeles de San Rafael, Spain at 5. The whole table spans 47 points today — a wide-open day, when the top and bottom of the table are effectively in different seasons.
Around Castellar del Vallès: Sentmenat, Spain (4 km away) reads 20 (Low); Matadepera, Spain (5 km away) reads 23 (Low); Caldes de Montbui, Spain (7 km away) reads 22 (Low). Castellar del Vallès reads exactly level with its nearest tracked neighbour today. Across Spain’s 2887 tracked cities, today runs from 5 in Segovia to 52 in l'Escala.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Castellar del Vallès resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every ragweed season, allergists in Castellar del Vallès, Spain 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.
Castellar del Vallès in its local area
Castellar del Vallès is in Província de Barcelona, Catalonia, Spain. Its population is 24,036 (GeoNames).
Across Spain’s 2887 tracked cities, Castellar del Vallès ranks joint 1319th today.
Like every Pollen Atlas city page, the Castellar del Vallès, Spain pollen count is refreshed each morning.
Nearby cities
- Sentmenat pollen count (4 km away)
- Matadepera pollen count (5 km away)
- Caldes de Montbui pollen count (7 km away)
- Terrassa pollen count (8 km away)
- Sabadell pollen count (8 km away)
- Polinyà pollen count (9 km away)
From Pollen Atlas News
Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).