Cullinan pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Cullinan is moderate; cypress and mulberry are moderate; eucalyptus, mugwort, and plane are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week eucalyptus will increase; cypress, mulberry, and plane will decrease; grass, oak, mugwort, and nettle will remain stable.
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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) | Moderate | 31/100 |
| Eucalyptus (Myrtaceae) | Low | 12/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 19/100 |
| Mulberry (Morus) | Moderate | 27/100 |
| Plane (Platanus) | Low | 14/100 |
| Nettle (Urtica) | None | 0/100 |
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) | Moderate | 33/100 | |
| Eucalyptus (Myrtaceae) | Low | 14/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 21/100 | |
| Mulberry (Morus) | Moderate | 29/100 | |
| Plane (Platanus) | Low | 15/100 | |
| Nettle (Urtica) | None | 0/100 |
Local Environmental Conditions
Cullinan lies roughly 80 km northeast of Johannesburg. Grassland dominates the land around Cullinan once you're past the eucalyptus- and acacia-lined streets near the centre, with coal mining and power station operations shaping much of what lies further out. The seasonal grass pollen surge each summer draws directly on this surrounding open plateau vegetation. This pattern holds true across most of the surrounding Highveld plateau.
The pollen calendar at Cullinan starts quietly, with acacia and eucalyptus trickling in from August before Highveld grass takes over decisively through October and November, against a backdrop shaped by coal mining and power station operations. Rain arriving in spring is what finally ends the dry, low-pollen winter stretch. This mirrors the broader seasonal pattern seen across much of the Highveld region.
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Frequently Asked Questions About Pollen in Gauteng
Is pollen high in Cullinan right now?
On 20 September 2026, overall pollen levels in Cullinan are moderate. Cypress is the main contributor to airborne pollen, while morus, artemisia, myrtle, and platanus remain at lower levels
Will pollen levels change in Cullinan tomorrow?
On 21 September 2026, pollen conditions in Cullinan will be similar to today, with artemisia at low levels, cypress at moderate levels, morus at moderate levels, myrtle at low levels, platanus at low levels
Is pollen expected to decrease in Cullinan this week?
According to the five-day outlook, cypress, morus, and platanus pollen levels are expected to gradually decrease, while myrtle pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Cullinan?
On 20 September 2026, Cypress is the dominant pollen source in Cullinan. morus, artemisia, myrtle, and platanus are also present but at lower levels. oak, urtica, and grass are not currently active.
When is pollen season in Cullinan?
How often is the Cullinan pollen forecast updated?
The Cullinan pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Cullinan 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 Cullinan 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 Cullinan, 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. |
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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).
