Carson City pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Carson City is high; ragweed is high; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass, mugwort, and ragweed will decrease.
Explore Forecasts
Air Quality
Pollen in Other Cities
Air Quality in Other Cities
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 15/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 25/100 |
| Ragweed (Ambrosia) | High | 67/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | Low | 14/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 25/100 | |
| Ragweed (Ambrosia) | High | 66/100 |
Local Environmental Conditions
Carson City's Great Basin Nevada state capital setting features cottonwood, sagebrush, and Jeffrey pine as the main pollen sources, with exposure varying between the Carson River corridor and the Sierra Nevada foothills residential areas and the surrounding sagebrush basin. The Sierra Nevada backdrop creates distinct orographic effects and the Carson Valley floor contrasts sharply with the surrounding desert sagebrush, while the Sierra Nevada pine woodland contributes substantially different pollen than the basin below.
Carson City's Great Basin Nevada setting produces a season opening in late February with cottonwood and sage before grass from surrounding Nevada and Sierra Nevada foothill land peaks through May and June. Mugwort from surrounding Great Basin desert extends exposure into September, while the dry intermountain climate means fewer rainfall interruptions and the Sierra Nevada backdrop concentrates pollen under certain easterly wind conditions.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Resource Hub
Frequently Asked Questions About Pollen in Nevada
Is pollen high in Carson City right now?
On 20 September 2026, overall pollen levels in Carson City are high. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Carson City tomorrow?
On 21 September 2026, pollen conditions in Carson City will be similar to today, with ambrosia at high levels, artemisia at low levels, grass at low levels
Is pollen expected to decrease in Carson City this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Carson City?
On 20 September 2026, Ambrosia is the dominant pollen source in Carson City. artemisia and grass are also present but at lower levels.
When is pollen season in Carson City?
How often is the Carson City pollen forecast updated?
The Carson City pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Carson City come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Carson City based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Carson City, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
