Welkom pollen forecast — St Helena neighborhood
Pollen Today
Today (20 September) pollen in St Helena, Welkom is low; cypress, eucalyptus, mugwort, mulberry, plane, and nettle are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, eucalyptus, mugwort, mulberry, plane, and nettle will decrease; grass and oak 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) | Low | 17/100 |
| Eucalyptus (Myrtaceae) | Low | 11/100 |
| Grass (Poaceae) | None | 0/100 |
| Oak (Quercus) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 7/100 |
| Mulberry (Morus) | Low | 15/100 |
| Plane (Platanus) | Low | 10/100 |
| Nettle (Urtica) | Low | 6/100 |
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) | Low | 20/100 | |
| Eucalyptus (Myrtaceae) | Low | 13/100 | |
| Grass (Poaceae) | None | 0/100 | |
| Oak (Quercus) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 8/100 | |
| Mulberry (Morus) | Low | 18/100 | |
| Plane (Platanus) | Low | 12/100 | |
| Nettle (Urtica) | Low | 8/100 |
Local Environmental Conditions
St Helena lies roughly 130 km north-northeast of Bloemfontein. At St Helena, acacia, eucalyptus, and Highveld grassland dominate the local pollen picture, with exposure varying between wooded residential streets and more open, built-up parts of town. Surrounding gold mining and processing operations adds further texture to the landscape, while farmland nearby contributes grass pollen through the summer rainfall months, consistent with the wider Highveld plateau environment.
St Helena's Highveld season opens in August with acacia and eucalyptus before grass from the surrounding grassland peaks through October and November. The dry winter months keep pollen low, while gold mining and processing operations nearby shapes the local landscape, and the summer rainfall pattern concentrates the main season into spring and early summer.
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Resource Hub
Pollen forecast neighborhoods 2 neighborhoods
Sports venues in Welkom 1 sports venue
Frequently Asked Questions About Pollen in Free State
Is pollen high in Welkom right now?
On 20 September 2026, overall pollen levels in Welkom are low. Morus is the main contributor to airborne pollen, while myrtle, platanus, urtica, artemisia, and cypress remain at lower levels
Will pollen levels change in Welkom tomorrow?
On 21 September 2026, pollen conditions in Welkom will be similar to today, with morus at low levels, myrtle at low levels, platanus at low levels, urtica at low levels, artemisia at low levels, cypress at low levels
Is pollen expected to decrease in Welkom this week?
According to the five-day outlook, morus, myrtle, platanus, urtica, artemisia, and cypress pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Welkom?
On 20 September 2026, Morus is the dominant pollen source in Welkom. myrtle, platanus, urtica, artemisia, and cypress are also present but at lower levels. grass and oak are not currently active.
When is pollen season in Welkom?
How often is the Welkom pollen forecast updated?
The Welkom pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Welkom 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 Welkom 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 Welkom, 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).
