Tree Pollen Count in Mercerville, NJ

Last updated Friday, November 6, 2026

This page shows the most recent reading available for Mercerville — from Friday, November 6, 2026 (1 day ago) — not today's reading.

This reading is the forecast point for Mercerville — 3 nearby places use the same point; Mercerville is 0.5 km from it.

Pollen by type in Mercerville

What is the tree pollen count in Mercerville today?

The Mercerville 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.

Mercerville’s overall pollen count today is 8 (Low) across all types. See the full Mercerville pollen count for the overall index and every type together.

Mercerville is a census-designated place in Mercer County, New Jersey. Its population is 13,693 (ACS 2023).

Mercerville Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 68Low
Saturday, November 719Low
Sunday, November 819Low
Monday, November 919Low
Tuesday, November 1019Low

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

Species driving Mercerville’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 Mercerville now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Mercerville. 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 New Jersey allergy season guide singles out oak, the spring heavyweight statewide, with maple sharing the stage and birch earning a real billing in the northwestern hills.

Mercerville allergies today

Mercerville allergies today are set by the same reading as the Mercerville pollen count today: the Total Pollen Index is 8 (Low), and the tree pollen index on this page is 0.6 (Low) of it. When people ask about Mercerville allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Mercerville.

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

Mercerville grass pollen count

Mercerville ragweed pollen count

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

See Mercerville on the pollen map

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

New Jersey allergy season guide

Tree pollen season

Find an allergist in Mercerville, NJ

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).