Hermosillo Pollen Count
Hermosillo, Mexico · Last updated Friday, November 6, 2026
This page shows the most recent reading available for Hermosillo — from Friday, November 6, 2026 (1 day ago) — not today's reading.
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).
Hermosillo, Mexico
Weeds Index
How active weeds pollen is today (0–100).
Hermosillo, Mexico
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day Hermosillo Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count Hermosillo residents check each morning
The Hermosillo pollen count today is 25 (Low). The main driver is Ragweed, with weed pollen at 27 today. Weed pollen leads the split at 27 (Low on its own scale), followed by tree pollen at 19 and grass pollen at 16. Below, the plant detail and the multi-day outlook show whether today is the pattern or the exception. Pollen Atlas updated this count on Friday, November 6, 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 weed pollen or mold, reading noticeably higher than the rest, which is why the split is printed on every Hermosillo 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 Hermosillo pollen forecast below — it is currently holding, with Friday the highest day in the window.
This is the pollen count Hermosillo residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the Hermosillo pollen count today?
The Hermosillo 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 Hermosillo: this page is updated every morning with the day’s modelled reading.
Hermosillo allergies today
Hermosillo 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 Hermosillo allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for Hermosillo.
Allergies in Hermosillo follow the Mexico 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 Hermosillo 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 Hermosillo allergy forecast: today reads 25 (Low), and the day-by-day outlook shows whether Hermosillo 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 Hermosillo today records is this same combined reading — tree, grass, weed and mold in one index.
The Hermosillo allergy count today is 25 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today Hermosillo: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Friday, November 6 | 25 | Low |
| Saturday, November 7 | 25 | Low |
| Sunday, November 8 | 24 | Low |
| Monday, November 9 | 24 | Low |
| Tuesday, November 10 | 24 | Low |
Pollen Atlas forecasts Hermosillo’s pollen count to peak on Friday at 25 (Low) over the next 5 days.
Pollen by type in Hermosillo
What is driving Hermosillo’s pollen today
The shape of today’s 25 (Low) is set by weed pollen at 27 (Low on its own scale) — about 44% of the four category readings added together, 8 points clear of the next category, tree pollen at 19. 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 a modelled reading, reported as modelled — no regional calendar is asserted for Mexico, and the modelled value outranks any general seasonal expectation.
In the plant detail, Grasses (grass) carries the strongest single plant reading, at a Universal Pollen Index of 1 (Very Low). No Mexico allergy season guide is published yet to cross-reference these names against — they are today’s measured plant detail for Hermosillo, ranked by plant index.
Across the five-day window the Total Pollen Index runs from 24 to 25, never changing band. Today’s 25 sits 1 point above the window’s average of 24.4 — a steady window, in which one day reads much like the next.
Plants affecting Hermosillo now
One plant is listed in today’s detail for Hermosillo.
- Grasses (grass): Universal Pollen Index 1 (Very Low) — out of season
Every pollen type, with photos and seasons: the pollen directory.
Hermosillo pollen through the year
Three chapters make the Mexico pollen year, and Hermosillo follows them in the Global order. The tree chapter: tree pollen seasons vary with local climate and vegetation, so this page reports the measured readings first and treats any calendar as background only. The grass chapter: grass pollen seasons vary with local climate and vegetation, and the measured value outranks any general seasonal expectation. The weed chapter: weed pollen seasons vary with local climate and vegetation, and no regional calendar is asserted for this area.
No Mexico allergy season guide is published yet, so this page does not single out signature pollens for Hermosillo — the calendar above is the Global regional pattern, and the plant detail on this page names what today’s feed actually records.
November in Hermosillo is reported from its modelled readings, not from a regional calendar — no regional calendar is asserted for Mexico, so the calendar alone explains little today, and the modelled split above carries the story. No Mexico allergy season guide is published yet — this calendar follows the Global regional pattern. See Hermosillo pollen count rankings and Hermosillo on the pollen heatmap.
How to read this index
Pollen Atlas reports the Hermosillo 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 Hermosillo, Mexico 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.
Hermosillo in today’s national picture
At 25 (Low), Hermosillo 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 Hermosillo: Ciudad Obregón, Mexico (205 km away) reads 24 (Low); Nogales, Mexico (247 km away) reads 22 (Low); Nogales, AZ (253 km away) reads 18 (Low). Hermosillo reads 1 point higher than its nearest tracked neighbour today. Across Mexico’s 94 tracked cities, today runs from 8 in Chilpancingo to 36 in Tijuana.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one Hermosillo resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in Hermosillo, Mexico 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.
Hermosillo in its local area
Hermosillo is in Hermosillo, Sonora, Mexico. Its population is 812,229 (GeoNames).
Across Mexico’s 94 tracked cities, Hermosillo ranks joint 5th today.
Like every Pollen Atlas city page, the Hermosillo, Mexico pollen count is refreshed each morning.
Nearby cities
- Ciudad Obregón pollen count (205 km away)
- Nogales pollen count (247 km away)
- Los Mochis pollen count (415 km away)
- Chihuahua pollen count (478 km away)
- San Luis Río Colorado pollen count (522 km away)
- La Paz pollen count (554 km away)
From Pollen Atlas News
See how Hermosillo ranks in today's pollen count rankings — the worst cities for allergies today
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).