St. Clair pollen forecast - today, tomorrow and the week ahead
Today (30 August) pollen in St. Clair is high; ragweed is high; grass and mugwort are moderate. Tomorrow (31 August 2026) levels are similar - grass remains moderate, ragweed remains high, mugwort declining. Over the following five days grass and ragweed will increase; mugwort will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Along the damp banks, hazel and willow release some of the year's first tree pollen, just outside the immediate area. Located not far from here, this area has a park whose lawns and ornamental trees quietly add to grass and ragweed pollen levels. Local wind exposure and land use can shift the exact mix slightly from block to block.
Today - 30 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Moderate
47/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Moderate
35/100
-
Ragweed (Ambrosia):
High
70/100
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 - 31 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Moderate
29/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
15/100
-
Ragweed (Ambrosia):
High
57/100
Air quality in St. Clair
View air qualityPollen forecast for neighborhoods and landmarks in St. Clair
Frequently Asked Questions
Is pollen high in St. Clair right now?
On 30 August 2026, overall pollen levels in St. Clair are high. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in St. Clair tomorrow?
On 31 August 2026, pollen conditions in St. Clair will be different from today, with ambrosia at high levels, grass at moderate levels and artemisia continuing to decline
Is pollen expected to decrease in St. Clair this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, while ambrosia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in St. Clair?
On 30 August 2026, Ambrosia is the dominant pollen source in St. Clair. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in St. Clair?
How often is the St. Clair pollen forecast updated?
The St. Clair pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in St. Clair 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 St. Clair 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 St. Clair, 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: 30 August 2026 at 08:36 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for St. Clair.
Get the full experience in 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.