Ragweed Pollen Count in Castle Rock, WA — Today

Updated Saturday, November 7, 2026

Pollen by type in Castle Rock

What is the ragweed pollen count in Castle Rock today?

The Castle Rock ragweed pollen index today is 13 (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 Castle Rock today. See the full Castle Rock pollen count for the overall index and every type together.

Castle Rock Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 711Low
Sunday, November 87Low
Monday, November 911Low
Tuesday, November 106Low
Wednesday, November 1113Low

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 Castle Rock’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Castle Rock’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 13 (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 Castle Rock now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Castle Rock. The type summary stands: ragweed pollen reads 13 (Low) today.

In the Pacific Northwest pattern, the plants that typically shape this city’s year are spring trees and late-spring grasses in the Pacific Northwest pattern — 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.

Weeds are the minor act — sagebrush and tumbleweed east of the Cascades carry into September. This month sits outside the usual ragweed pollen window for the Pacific Northwest pattern, so today’s ragweed pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Washington allergy season guide singles out alder and hazelnut from January on the west side, and timothy and sagebrush on Spokane’s continental clock.

Castle Rock allergies today

Castle Rock allergies today are set by the same reading as the Castle Rock pollen count today: the Total Pollen Index is 11 (Low), and the ragweed pollen index on this page is 13 (Low) of it. When people ask about Castle Rock allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Castle Rock.

Allergies in Castle Rock follow the Washington calendar set out on the full Castle Rock 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 Castle Rock 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 Castle Rock allergy forecast for the ragweed pollen season: it shows whether Castle Rock 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 Castle Rock pollen count — all types, the overall index and today’s ranking context

Castle Rock tree pollen count

Castle Rock grass pollen count

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

See Castle Rock on the pollen map

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

Washington allergy season guide

Ragweed season

Find an allergist in Castle Rock, WA

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).