South Lake Tahoe pollen forecast — Crystal Springs Campground neighborhood
Pollen Today
Today (20 September) pollen in Crystal Springs Campground, South Lake Tahoe is low; mugwort and ragweed are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week mugwort and ragweed will decrease; grass will remain stable.
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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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 10/100 |
| Ragweed (Ambrosia) | Low | 25/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 8/100 | |
| Ragweed (Ambrosia) | Low | 23/100 |
Local Environmental Conditions
Located within easy reach, this area has aspen and willow thrive along the cold mountain bank, both common Sierra streamside trees. Located nearby, this area has a mix of ponderosa pine and Douglas fir trees, conifer pollen a notable spring contributor here. Neighboring areas with similar land cover tend to show a closely matching pollen mix.
Average temperatures range from about -1°C in January to 22°C in July, and most of the 652 mm annual rainfall falls in the cooler months around January. Pollen activity typically picks up as temperatures climb out of the January low, from around February onward.
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Frequently Asked Questions About Pollen in California
Is pollen high in South Lake Tahoe right now?
On 20 September 2026, overall pollen levels in South Lake Tahoe are low. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in South Lake Tahoe tomorrow?
On 21 September 2026, pollen conditions in South Lake Tahoe will be similar to today, with ambrosia at low levels, artemisia at low levels
Is pollen expected to decrease in South Lake Tahoe this week?
According to the five-day outlook, ambrosia and artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in South Lake Tahoe?
On 20 September 2026, Ambrosia is the dominant pollen source in South Lake Tahoe. artemisia are also present but at lower levels. grass are not currently active.
When is pollen season in South Lake Tahoe?
How often is the South Lake Tahoe pollen forecast updated?
The South Lake Tahoe pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in South Lake Tahoe 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 South Lake Tahoe 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 South Lake Tahoe, 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).
