Tree Pollen Count in Castel San Pietro, Switzerland — Today
Updated Saturday, November 7, 2026
Pollen by type in Castel San Pietro
What is the tree pollen count in Castel San Pietro today?
The Castel San Pietro tree pollen index today is 4 (Low) on Pollen Atlas’s modelled 0–100 scale. Low
Modelled pollen risk index — not a measured count.
Castel San Pietro’s overall pollen count today is 20 (Low) across all types. See the full Castel San Pietro pollen count for the overall index and every type together.
Castel San Pietro is in Mendrisio District, Ticino, Switzerland. Its population is 2,150 (GeoNames).
Castel San Pietro Tree Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 20 | Low |
| Sunday, November 8 | 30 | Low |
| Monday, November 9 | 29 | Low |
| Tuesday, November 10 | 29 | Low |
| Wednesday, November 11 | 29 | Low |
Pollen Atlas models the daily detail as an overall index: day-by-day splits by individual pollen type are not part of the modelled data, so this table shows Castel San Pietro’s overall trend across the week. Today’s tree pollen reading is the headline above.
Species driving Castel San Pietro’s tree pollen
Species-level counts are not part of the modelled data Pollen Atlas publishes — the modelled index is reported per pollen type, not per species — so this section gives the type summary: tree pollen reads 4 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.
Plants affecting Castel San Pietro now — tree pollen
Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Castel San Pietro. The type summary stands: tree pollen reads 4 (Low) today.
In the Continental West pattern, the plants that typically shape this city’s year are early hazel and alder, a birch-led spring, late-spring grasses, and late-summer mugwort and ragweed — named here as regional context only, not as today’s readings.
Plant detail returns here automatically on any day the feed includes it.
What this tree pollen level means
Low risk. Keep windows open; consider allergy meds only if sensitive.
Enjoy outdoor activities.
Hazel and alder open from February, and birch leads the spring peak through April and into May. This month sits outside the usual tree pollen window for the Continental West pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. No Switzerland allergy season guide is published yet, so the seasonal context here follows the Continental West regional pattern.
Castel San Pietro allergies today
Castel San Pietro allergies today are set by the same reading as the Castel San Pietro pollen count today: the Total Pollen Index is 20 (Low), and the tree pollen index on this page is 4 (Low) of it. When people ask about Castel San Pietro allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Castel San Pietro.
Allergies in Castel San Pietro follow the Switzerland calendar set out on the full Castel San Pietro page — the chapters, the plants behind them, and the 5-day forecast show whether today is typical for the season or an exception to it. If you are checking allergies today in Castel San Pietro before heading outdoors, the tree pollen split on this page is the part to read: it shows whether this pollen type is doing the work today, not just how high the total sits.
Read the five-day overall trend above as the Castel San Pietro allergy forecast for the tree pollen season: it shows whether Castel San Pietro allergies are set to ease or build across the week, day by day — the days to plan outdoor time around are the ones where the overall index steps down, not just today.
Castel San Pietro grass pollen count
Castel San Pietro ragweed pollen count
See Castel San Pietro on the pollen map
Every pollen type, with photos and seasons: the pollen directory
Pollen indexes: a modelled pollen risk index computed by Pollen Atlas from open weather, vegetation and phenology data, calibrated against CDC/NAB season data. Plant detail: Google Pollen API. Index values are modelled, not measured counts. Sources: CDC/NAB; USA-NPN; GBIF (CC BY); ESA WorldCover (CC BY 4.0).