Pollen and allergies in Trieste
The highest pollen in Trieste today is ragweed, at 86 grains/m³ — a very high level.
Modelled for Friday 4 September, 02:00
Pollen in Trieste today
| Pollen | Count | Level |
|---|---|---|
| AlderAlnus | 0grains/m³ | None |
| BirchBetula | 0grains/m³ | None |
| OliveOlea | 0grains/m³ | None |
| GrassPoaceae | 1.9grains/m³ | Low |
| MugwortArtemisia | 2.5grains/m³ | Low |
| RagweedAmbrosia | 86grains/m³ | Very high |
The next 4 days
Daily maximum counts in grains/m³. Only grass, mugwort and ragweed pollen rise above zero in this window; the rest are out of season.
| Day | Grass | Mugwort | Ragweed | Level |
|---|---|---|---|---|
| Today4 Sept | 1.9 | 2.5 | 86 | Very high |
| Tomorrow5 Sept | 1.7 | 1.6 | 55 | Very high |
| Sunday6 Sept | 1.3 | 1.0 | 61 | Very high |
| Monday7 Sept | 1.1 | 0.9 | 11 | Moderate |
This season so far
The highest daily count recorded for each pollen in Trieste since 4 June, which puts today's figures in context.
| Pollen | Peak count | Reached on | Level |
|---|---|---|---|
| Birch | 3.4grains/m³ | Sunday 14 June | Low |
| Olive | 24grains/m³ | Monday 8 June | Low |
| Grass | 46grains/m³ | Friday 12 June | Moderate |
| Mugwort | 21grains/m³ | Wednesday 5 August | Moderate |
| Ragweed | 118grains/m³ | Monday 24 August | Very high |
What this means for you
Symptoms are likely even with treatment, and asthma can be triggered. Stay indoors with the windows closed where you can, avoid drying laundry outside, and keep reliever medication to hand.
How pollen levels are scored
Thresholds differ by plant, because the amount of pollen it takes to provoke symptoms differs by plant. A count of 20 is a moderate grass day and a very high ragweed one.
| Pollen | Low | Moderate | High | Very high | Usually in the air |
|---|---|---|---|---|---|
| Alder | 1–9 | 10–99 | 100–999 | 1000+ | January to March |
| Birch | 1–9 | 10–99 | 100–999 | 1000+ | March to May |
| Olive | 1–49 | 50–199 | 200–999 | 1000+ | April to June |
| Grass | 1–19 | 20–49 | 50–199 | 200+ | May to August |
| Mugwort | 1–9 | 10–29 | 30–99 | 100+ | July to September |
| Ragweed | 1–9 | 10–19 | 20–49 | 50+ | August to October |
How these figures are produced
These counts come from the Copernicus atmospheric monitoring service, which models pollen concentrations on a grid across Europe, sampled at the coordinates of Trieste. They are modelled values rather than grains counted at a pollen trap in the town, so neighbouring localities in the same grid cell will show similar figures, and a tree in flower on your street can matter more than the number here. Treat them as a regional indication. They are not medical advice: if symptoms are severe or persistent, speak to a doctor or pharmacist.
