Cathedral City pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Cathedral City is high; ragweed is high; grass is moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed remains high, grass declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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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) | Moderate | 44/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 18/100 |
| Ragweed (Ambrosia) | High | 70/100 |
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) | Low | 24/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | High | 56/100 |
Local Environmental Conditions
Cathedral City's Coachella Valley California desert setting features smoke tree, blue palo verde, and fan palm as the main native pollen sources alongside ornamental residential plantings. Exposure varies between the limited irrigated residential oasis vegetation and the surrounding Sonoran Desert, while the San Jacinto Mountain backdrop creates distinctive downslope wind conditions and the stark contrast between irrigated city vegetation and native desert creates the most pronounced local pollen variation in the valley.
Cathedral City's Coachella Valley setting produces a season opening in January with palo verde and desert willow before grass from surrounding desert land peaks through March and April. Mugwort extends exposure into September, while the extremely hot desert summer suppresses pollen from July through early September and the San Jacinto Mountain backdrop concentrates pollen under certain wind conditions throughout the spring season.
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Frequently Asked Questions About Pollen in California
Is pollen high in Cathedral City right now?
On 20 September 2026, overall pollen levels in Cathedral City are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Cathedral City tomorrow?
On 21 September 2026, pollen conditions in Cathedral City will be different from today, with ambrosia at high levels and grass continuing to decline
Is pollen expected to decrease in Cathedral City this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels will increase later in the week.
Which pollen types are currently active in Cathedral City?
On 20 September 2026, Ambrosia is the dominant pollen source in Cathedral City. grass and artemisia are also present but at lower levels.
When is pollen season in Cathedral City?
How often is the Cathedral City pollen forecast updated?
The Cathedral City pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Cathedral City 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 Cathedral City 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 Cathedral City, 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).
