Ragweed Pollen Count in Castleton-on-Hudson, NY — Today

Updated Saturday, November 7, 2026

Pollen by type in Castleton-on-Hudson

What is the ragweed pollen count in Castleton-on-Hudson today?

The Castleton-on-Hudson ragweed pollen index today is 15 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Castleton-on-Hudson today. See the full Castleton-on-Hudson pollen count for the overall index and every type together.

Castleton-on-Hudson Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 712Low
Sunday, November 812Low
Monday, November 912Low
Tuesday, November 1018Low
Wednesday, November 1116Low

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 Castleton-on-Hudson’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Castleton-on-Hudson’s ragweed 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: ragweed pollen reads 15 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

How to read this: the “ragweed” figure on this site is the modelled weed pollen index — the weed group (ragweed + mugwort) — printed under the ragweed name the rankings use.

Plants affecting Castleton-on-Hudson now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Castleton-on-Hudson. The type summary stands: ragweed pollen reads 15 (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 ragweed pollen level means

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

Enjoy outdoor activities.

Ragweed builds from mid-August, peaks in September, and is ended by the first hard frost. This month sits outside the usual ragweed pollen window for the Northeast pattern, so today’s ragweed pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The New York allergy season guide singles out birch and oak, preceded by elm and maple.

Castleton-on-Hudson allergies today

Castleton-on-Hudson allergies today are set by the same reading as the Castleton-on-Hudson pollen count today: the Total Pollen Index is 12 (Low), and the ragweed pollen index on this page is 15 (Low) of it. When people ask about Castleton-on-Hudson allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Castleton-on-Hudson.

Allergies in Castleton-on-Hudson follow the New York calendar set out on the full Castleton-on-Hudson 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 Castleton-on-Hudson before heading outdoors, the ragweed 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 Castleton-on-Hudson allergy forecast for the ragweed pollen season: it shows whether Castleton-on-Hudson 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 Castleton-on-Hudson pollen count — all types, the overall index and today’s ranking context

Castleton-on-Hudson tree pollen count

Castleton-on-Hudson grass pollen count

See how Castleton-on-Hudson ranks in today's pollen count rankings — the worst cities for allergies today

See Castleton-on-Hudson on the pollen map

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

New York allergy season guide

Ragweed season

Find an allergist in Castleton-on-Hudson, NY

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).