Ragweed Pollen Count in Williamsburg, OH

Last updated Friday, November 6, 2026

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

Pollen by type in Williamsburg

What is the ragweed pollen count in Williamsburg today?

The Williamsburg ragweed pollen index today is 33 (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 Williamsburg today. See the full Williamsburg pollen count for the overall index and every type together.

Williamsburg Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 625Low
Saturday, November 725Low
Sunday, November 825Low
Monday, November 925Low
Tuesday, November 1025Low

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

Species driving Williamsburg’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 33 (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 Williamsburg now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Williamsburg. The type summary stands: ragweed pollen reads 33 (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 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 ends at the first frost. This month sits outside the usual ragweed pollen window for the Midwest & Great Lakes pattern, so today’s ragweed 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.

Williamsburg allergies today

Williamsburg allergies today are set by the same reading as the Williamsburg pollen count today: the Total Pollen Index is 25 (Low), and the ragweed pollen index on this page is 33 (Low) of it. When people ask about Williamsburg allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Williamsburg.

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

Williamsburg tree pollen count

Williamsburg grass pollen count

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

See Williamsburg on the pollen map

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

Ohio allergy season guide

Ragweed season

Find an allergist in Williamsburg, 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).