Simi Valley pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Simi Valley is none Tomorrow (26 June 2026) levels are similar. 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
Simi Valley's parks, including Rancho Santa Susana Community Park and the Arroyo Simi corridor, feature oak, sycamore, and introduced eucalyptus as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Ventura County chaparral and the Santa Susana Mountain foothills contribute substantial grass and scrub pollen under prevailing offshore winds.
Today - 25 June
-
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
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):
None
0/100
-
Willow (Salicaceae):
None
0/100
Pollen forecast for neighborhoods and landmarks in Simi Valley
Frequently Asked Questions
Is pollen high in Simi Valley right now?
Currently, there is no significant pollen in Simi Valley.
Will pollen levels change in Simi Valley tomorrow?
On 26 June 2026, pollen conditions in Simi Valley will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Simi Valley this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Simi Valley?
On 25 June 2026, there are no significant pollen types in Simi Valley.
When is pollen season in Simi Valley?
How often is the Simi Valley pollen forecast updated?
The Simi Valley pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Simi Valley 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 Simi Valley 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 Simi Valley, 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 Simi Valley.
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.