Florissant pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Florissant is low; cypress and grass are low. Tomorrow (26 June 2026) levels are similar - grass remains low. Over the following five days cypress and grass will increase. 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
Florissant's St. Louis County Missouri suburban setting features oak, maple, and sweetgum as the main tree pollen sources, with exposure varying between the wooded residential neighborhoods along Coldwater Creek and the more built-up commercial corridors along New Halls Ferry Road. The Coldwater Creek corridor and the Ferguson Park system provide locally significant green space, while the surrounding Missouri woodland contributes substantial tree pollen and the flat Missouri landscape allows grass pollen to disperse widely.
Today - 25 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
1/100
-
Grass (Poaceae):
Low
19/100
-
Willow (Salicaceae):
None
0/100
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 - 26 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
12/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Florissant right now?
On 25 June 2026, overall pollen levels in Florissant are low. Cypress is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Florissant tomorrow?
On 26 June 2026, pollen conditions in Florissant will be different from today, with grass at low levels
Is pollen expected to decrease in Florissant this week?
According to the five-day outlook, cypress and grass pollen levels will increase later in the week.
Which pollen types are currently active in Florissant?
On 25 June 2026, Cypress is the dominant pollen source in Florissant. grass are also present but at lower levels. hazel and willow are not currently active.
When is pollen season in Florissant?
How often is the Florissant pollen forecast updated?
The Florissant pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Florissant 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 Florissant 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 Florissant, 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: 25 Jun 2026, 09:01 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Florissant.
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
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.