Silverthorne pollen forecast - today, tomorrow and the week ahead
Today (20 July) pollen in Silverthorne is medium; ragweed is medium; grass is low. Tomorrow (21 July 2026) levels are similar - ragweed remains medium, grass increasing. Over the following five days ragweed will increase; grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
The vegetation around Silverthorne, on a mountain valley beside Lake Dillon in Summit County, is dominated by lodgepole pine and aspen groves, with alpine wildflower meadows adding further seasonal pollen exposure. Exposure varies with proximity to green space versus the more built-up parts of Silverthorne. The mix of native and introduced species here is fairly typical for this part of the country.
Today - 20 July
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
22/100
-
Oak (Quercus):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
-
Ragweed (Ambrosia):
Medium
32/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 21 July
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Medium
28/100
-
Oak (Quercus):
None
0/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
-
Ragweed (Ambrosia):
Medium
40/100
Air quality in Silverthorne
View air qualityFrequently Asked Questions
Is pollen high in Silverthorne right now?
On 20 July 2026, overall pollen levels in Silverthorne are moderate. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Silverthorne tomorrow?
On 21 July 2026, pollen conditions in Silverthorne will be different from today, with ambrosia at medium levels and grass increasing
Is pollen expected to decrease in Silverthorne this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, while ambrosia and artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Silverthorne?
On 20 July 2026, Ambrosia is the dominant pollen source in Silverthorne. grass are also present but at lower levels. cypress, oak, willow, alder, artemisia, and birch are not currently active.
When is pollen season in Silverthorne?
How often is the Silverthorne pollen forecast updated?
The Silverthorne pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Silverthorne 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 Silverthorne 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 Silverthorne, 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.
Want to see pollen forecasts for other cities in United States?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 20 July 2026 at 16:32 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Silverthorne.
For long term forecasts and maps, see the Airmine app
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.