Tree Pollen Count in Sewickley, PA — Today
Updated Saturday, November 7, 2026
Pollen by type in Sewickley
What is the tree pollen count in Sewickley today?
The Sewickley tree pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low
Modelled pollen risk index — not a measured count.
Sewickley’s overall pollen count today is 18 (Low) across all types. See the full Sewickley pollen count for the overall index and every type together.
Sewickley Tree Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 18 | Low |
| Sunday, November 8 | 18 | Low |
| Monday, November 9 | 18 | Low |
| Tuesday, November 10 | 18 | Low |
| Wednesday, November 11 | 18 | 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 Sewickley’s overall trend across the week. Today’s tree pollen reading is the headline above.
Species driving Sewickley’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 0.6 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.
Plants affecting Sewickley now — tree pollen
Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Sewickley. The type summary stands: tree pollen reads 0.6 (Low) today.
In the Northeast pattern, the plants that typically shape this city’s year are spring trees, late-spring grasses and late-summer 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.
Trees open in late March and build to an oak-led peak in May. This month sits outside the usual tree pollen window for the Northeast pattern, so today’s tree pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Pennsylvania allergy season guide singles out oak, peaking in late April and May, with maple sharing the spring stage.
Sewickley allergies today
Sewickley allergies today are set by the same reading as the Sewickley pollen count today: the Total Pollen Index is 18 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Sewickley allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Sewickley.
Allergies in Sewickley follow the Pennsylvania calendar set out on the full Sewickley 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 Sewickley 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 Sewickley allergy forecast for the tree pollen season: it shows whether Sewickley 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.
See the full Sewickley pollen count — all types, the overall index and today’s ranking context
Sewickley ragweed pollen count
See how Sewickley ranks in today's pollen count rankings — the worst cities for allergies today
See Sewickley 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).