Grass Pollen Count in Port Jefferson, OH — Today

Updated Saturday, November 7, 2026

Pollen by type in Port Jefferson

What is the grass pollen count in Port Jefferson today?

The Port Jefferson grass pollen index today is 1 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Port Jefferson’s overall pollen count today is 27 (Low) across all types. See the full Port Jefferson pollen count for the overall index and every type together.

Port Jefferson Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 727Low
Sunday, November 827Low
Monday, November 927Low
Tuesday, November 1027Low
Wednesday, November 1126Low

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

Species driving Port Jefferson’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 Port Jefferson is 1 (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.

The Ohio allergy season guide singles out ragweed, the state’s fall heavyweight, over a three-act year.

Plants affecting Port Jefferson now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Port Jefferson. The type summary stands: grass pollen reads 1 (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. The Ohio allergy season guide singles out ragweed, the state’s fall heavyweight, over a three-act year.

Port Jefferson allergies today

Port Jefferson allergies today are set by the same reading as the Port Jefferson pollen count today: the Total Pollen Index is 27 (Low), and the grass pollen index on this page is 1 (Low) of it. When people ask about Port Jefferson allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Port Jefferson.

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

Port Jefferson tree pollen count

Port Jefferson ragweed pollen count

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

See Port Jefferson on the pollen map

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

Ohio allergy season guide

Grass pollen season

Find an allergist in Port Jefferson, OH

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).