San Luis Río Colorado, Mexico Pollen Count Today
San Luis Río Colorado, Mexico · 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).
San Luis Río Colorado, Mexico
Weeds Index
How active weeds pollen is today (0–100).
San Luis Río Colorado, Mexico
Pollen Types
Pick a pollen subtype to update the species forecast
5-Day San Luis Río Colorado Overall Pollen Forecast
Bars are colored by severity (Low/Moderate/High).
Pollen count San Luis Río Colorado residents check each morning
The San Luis Río Colorado pollen count today is 23 (Low). The main driver is Ragweed, with weed pollen at 27 today. The full split is tree pollen 19, grass pollen 4, weed pollen 27. The sections below break that headline number down by plant, by day and by what the band means in practice. 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 weed pollen or mold, reading noticeably higher than the rest, which is why the split is printed on every San Luis Río Colorado 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 San Luis Río Colorado pollen forecast below — it is currently mixed, with Saturday the highest day in the window.
This is the pollen count San Luis Río Colorado residents check each morning, built from the day’s tree, grass, weed and mold readings.
What is the San Luis Río Colorado pollen count today?
The San Luis Río Colorado pollen count today is 23 out of 100 (Low) on the Pollen Atlas Total Pollen Index, driven mainly by Ragweed.
Short answer for anyone searching pollen count today San Luis Río Colorado: this page is updated every morning with the day’s modelled reading.
San Luis Río Colorado allergies today
San Luis Río Colorado allergies today are set by the same reading as the pollen count above: the Total Pollen Index is 23 (Low), driven mainly by Ragweed. When people ask about San Luis Río Colorado allergies, this is the number that answers them — one daily index built from today’s tree, grass, weed and mold readings for San Luis Río Colorado.
Allergies in San Luis Río Colorado 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 San Luis Río Colorado 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 San Luis Río Colorado allergy forecast: today reads 23 (Low), and the day-by-day outlook shows whether San Luis Río Colorado 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 San Luis Río Colorado today records is this same combined reading — tree, grass, weed and mold in one index.
The San Luis Río Colorado allergy count today is 23 (Low) — the same Total Pollen Index as the pollen count above, in one combined reading.
Pollen count today San Luis Río Colorado: the 5-day forecast
| Day | Total Pollen Index | Band |
|---|---|---|
| Saturday, November 7 | 23 | Low |
| Sunday, November 8 | 23 | Low |
| Monday, November 9 | 23 | Low |
| Tuesday, November 10 | 21 | Low |
| Wednesday, November 11 | 22 | Low |
Pollen Atlas forecasts San Luis Río Colorado’s pollen count to peak on Saturday at 23 (Low) over the next 5 days.
Pollen by type in San Luis Río Colorado
What is driving San Luis Río Colorado’s pollen today
The shape of today’s 23 (Low) is set by weed pollen at 27 (Low on its own scale) — about 54% 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.
Plant-level detail is not in today’s feed for San Luis Río Colorado, 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 21 to 23, never changing band. Today’s 23 sits 1 point above the window’s average of 22.4 — a steady window, in which one day reads much like the next.
Plants affecting San Luis Río Colorado now
Detailed plant-by-plant readings for San Luis Río Colorado 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 19 (Low).
Grass pollen is one of the categories with a non-zero reading today, at 4 (Low).
Weed pollen is one of the categories with a non-zero reading today, at 27 (Low).
In the Global pattern, the plants that shape this city’s year vary with its local climate and vegetation, and no single regional calendar is published for this area — 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.
San Luis Río Colorado pollen through the year
The San Luis Río Colorado pollen year runs in chapters, set by the Global pattern and the Mexico calendar. Trees come first: tree pollen seasons vary with local climate and vegetation, so this page reports the measured readings first and treats any calendar as background only. Grasses take the middle of the year: grass pollen seasons vary with local climate and vegetation, and the measured value outranks any general seasonal expectation. Weeds close it out: 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 San Luis Río Colorado — the calendar above is the Global regional pattern, and the plant detail on this page names what today’s feed actually records.
November in San Luis Río Colorado 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 San Luis Río Colorado pollen count rankings and San Luis Río Colorado on the pollen heatmap.
How to read this index
Pollen Atlas reports the San Luis Río Colorado 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 San Luis Río Colorado, 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.
San Luis Río Colorado in today’s national picture
At 23 (Low), San Luis Río Colorado ranks joint 40203rd 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 San Luis Río Colorado: San Luis, AZ (6 km away) reads 26 (Low); Gadsden, AZ (11 km away) reads 33 (Low); Somerton, AZ (18 km away) reads 33 (Low). San Luis Río Colorado reads 3 points lower than its nearest tracked neighbour today. Across Mexico’s 94 tracked cities, today runs from 7 in Córdoba to 36 in Tijuana.
Pollen totals are population numbers; symptoms are personal. The same reading can leave one San Luis Río Colorado resident untouched and floor another, depending on which pollens they are sensitised to. If this pattern finds you every season, allergists in San Luis Río Colorado, 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.
San Luis Río Colorado in its local area
San Luis Río Colorado is in San Luis Río Colorado, Sonora, Mexico. Its population is 176,685 (GeoNames).
Across Mexico’s 94 tracked cities, San Luis Río Colorado ranks joint 14th today.
Like every Pollen Atlas city page, the San Luis Río Colorado, Mexico pollen count is refreshed each morning.
Nearby cities
- Mexicali pollen count (67 km away)
- Ensenada pollen count (184 km away)
- Tijuana pollen count (210 km away)
- Nogales pollen count (383 km away)
- Hermosillo pollen count (522 km away)
- Ciudad Obregón pollen count (722 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).