Tree Pollen Count in Bryn Mawr, PA — Today

Updated Saturday, November 7, 2026

Pollen by type in Bryn Mawr

What is the tree pollen count in Bryn Mawr today?

The Bryn Mawr 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.

Bryn Mawr’s overall pollen count today is 20 (Low) across all types. See the full Bryn Mawr pollen count for the overall index and every type together.

Bryn Mawr Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 720Low
Sunday, November 819Low
Monday, November 919Low
Tuesday, November 1019Low
Wednesday, November 1119Low

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 Bryn Mawr’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Bryn Mawr’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 Bryn Mawr now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Bryn Mawr. 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.

Bryn Mawr allergies today

Bryn Mawr allergies today are set by the same reading as the Bryn Mawr pollen count today: the Total Pollen Index is 20 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Bryn Mawr allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Bryn Mawr.

Allergies in Bryn Mawr follow the Pennsylvania calendar set out on the full Bryn Mawr 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 Bryn Mawr 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 Bryn Mawr allergy forecast for the tree pollen season: it shows whether Bryn Mawr 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 Bryn Mawr pollen count — all types, the overall index and today’s ranking context

Bryn Mawr grass pollen count

Bryn Mawr ragweed pollen count

See how Bryn Mawr ranks in today's pollen count rankings — the worst cities for allergies today

See Bryn Mawr on the pollen map

Every pollen type, with photos and seasons: the pollen directory

Pennsylvania allergy season guide

Tree pollen season

Find an allergist in Bryn Mawr, PA

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).