Pollen today
Loading today’s values…
Ragweed is very low in Las Vegas today.
Ragweed should stay very low through Saturday.
Today in Las Vegas, NevadaTuesday, November 3
Weed1Very lowRagweed
TreeNo index
GrassNo index
Next four days, highest level each day:
Wed1Very low
Thu1Very low
Fri1Very low
Sat1Very low
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Plant by plant
Google’s index for each plant it models in Las Vegas today. A plant out of season has no index.
Plants in Las VegasTuesday, November 3
Ragweed1Very low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
ElmNo index
GrassesNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in Las Vegas
The forecast that moves pollen around, and the air beside it.
Weather forecast
- This Afternoon
- Mostly Sunny. High 66 °F. Wind ESE 6 mph.
- Tonight
- Clear. Low 51 °F. Wind W 2 to 6 mph.
Forecast: National Weather Service, updated 10:33 am PT.
Pollen alerts for Las Vegas by email
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Las Vegas’s year in pollen
Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for Las Vegas began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
Tree
Grass
Weed
0 None1 Very low2 Low3 Moderate4 High5 Very highThis weekNot recorded
See it as a table
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 28 to Nov 3 | Not recorded | 1 Very low | 2 Low |
| Oct 21 to Oct 27 | Not recorded | 1 Very low | 2 Low |
| Oct 14 to Oct 20 | 0 None | 1 Very low | 3 Moderate |
Source: Includes pollen data from GoogleIncludes data from Google Maps
Beyond today’s pollen
What this forecast doesn’t measure, and when to get help.
No mold level
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Las Vegas on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
No indoor allergens
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
Asthma in Las Vegas
An estimated 10.5% of adults in the city of Las Vegas have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.3% to 11.7%). It is a statistical estimate from national survey data, not a count.
Allergists in the Las Vegas area
11 allergists enrolled in Medicare practice in the Las Vegas area: 0.46 for every 100,000 people, fewer than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the Las Vegas area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
Las Vegas’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
Tree pollen far outweighed weed and grass pollen in a year of air sampling at five sites across the Las Vegas Valley.2 Tree pollen averaged 130 grains per cubic meter of air over the year, against 6 for weeds and 3 for grass.2 The study’s authors write that urbanization has turned this part of the Mojave Desert into a green oasis by bringing in non-native plants, some of them allergenic.2
Only about 4 inches of rain and other precipitation falls at the airport in an average year, yet a typical year has about 333 days between the last spring freeze and the first fall freeze.1 Clark County banned fruitless mulberry trees in 1991 because of the pollen they shed, and banned European olive trees the same year.3 A University of Nevada extension guide for Southern Nevada notes that some grasses, such as Bermuda grass, are more prone than others to cause allergies.4
A 2023 UNLV article names ash, mulberry, olive, pine and sycamore trees as the biggest offenders in spring and early summer.3 Ragweed and sagebrush appear in fall.3 A pollen monitoring program launched in 2013 as a partnership of UNLV, the Clark County School District and the county’s Department of Air Quality.3
Sources
- U.S. Climate Normals 1991–2020: Las Vegas McCarran Airport (USW00023169). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- Variation in Airborne Pollen Concentrations among Five Monitoring Locations in a Desert Urban Environment. Environmental Monitoring and Assessment (University of Nevada, Las Vegas repository). Read on October 15, 2026.
- Nevada Allergies Nothing to Sneeze At. University of Nevada, Las Vegas. Read on October 15, 2026.
- Allergenic Plants in Southern Nevada (Landscaping for an allergy free yard). Extension, University of Nevada, Reno. Read on October 15, 2026.
Questions about pollen in Las Vegas
Answered from the values on this page.
Is pollen high in Las Vegas today?
No. The highest level in Las Vegas today, Tuesday, November 3, is very low (1 on the 0 to 5 index), led by ragweed. Weed pollen is very low.
Which pollen is in the air in Las Vegas today?
According to Google’s model: Ragweed (very low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in Las Vegas?
No. Google’s forecast for tomorrow, Wednesday, is very low (1 on the 0 to 5 index), the same as today. Over the next four days, the highest forecast is very low, on Wednesday.
Is this a pollen count?
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Las Vegas. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
When does this page update?
Twice a day. We fetch new values soon after midnight in Las Vegas, so each day starts with its own values, and again after Google’s daily model run, usually by about 7:30 am PT. Each section shows when its values were retrieved.
How long has AllergyNest recorded pollen in Las Vegas?
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps