Grass Pollen Count in Newmarket, ON — Today

Updated Saturday, November 7, 2026

Pollen by type in Newmarket

What is the grass pollen count in Newmarket today?

The Newmarket grass pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Newmarket’s overall pollen count today is 19 (Low) across all types. See the full Newmarket pollen count for the overall index and every type together.

Newmarket is in York, Ontario, Canada. Its population is 91,034 (GeoNames).

Newmarket Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 719Low
Sunday, November 821Low
Monday, November 921Low
Tuesday, November 1021Low
Wednesday, November 1121Low

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 Newmarket’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Newmarket’s grass pollen

The modelled data reports grass as one combined index — there is no species-by-species split for grass anywhere in the data, so this page does not invent one. Today’s modelled grass index for Newmarket is 0.6 (Low), and the 5-day overall trend above shows the shape of the week.

As regional context only — not as today’s readings — in the Midwest & Great Lakes pattern, the plants that typically shape this city’s year are spring trees, late-spring and summer grasses, and late-summer and autumn ragweed.

Plants affecting Newmarket now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Newmarket. The type summary stands: grass pollen reads 0.6 (Low) today.

In the Midwest & Great Lakes pattern, the plants that typically shape this city’s year are spring trees, late-spring and summer grasses, and late-summer and autumn 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 grass pollen level means

Low risk. Keep windows open; consider allergy meds only if sensitive.

Enjoy outdoor activities.

Grasses hold from May through July. This month sits outside the usual grass pollen window for the Midwest & Great Lakes pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. No Ontario allergy season guide is published yet, so the seasonal context here follows the Midwest & Great Lakes regional pattern.

Newmarket allergies today

Newmarket allergies today are set by the same reading as the Newmarket pollen count today: the Total Pollen Index is 19 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Newmarket allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Newmarket.

Allergies in Newmarket follow the Ontario calendar set out on the full Newmarket 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 Newmarket before heading outdoors, the grass 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 Newmarket allergy forecast for the grass pollen season: it shows whether Newmarket 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 Newmarket pollen count — all types, the overall index and today’s ranking context

Newmarket tree pollen count

Newmarket ragweed pollen count

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

See Newmarket on the pollen map

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

Worst cities for allergies

Grass pollen season

Find an allergist in Newmarket, ON

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).