Ragweed Pollen Count in Rio, WI — Today

Updated Saturday, November 7, 2026

Pollen by type in Rio

What is the ragweed pollen count in Rio today?

The Rio ragweed pollen index today is 51 (Moderate) on Pollen Atlas’s modelled 0–100 scale. Moderate

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Rio today. See the full Rio pollen count for the overall index and every type together.

Rio Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 739Low
Sunday, November 831Low
Monday, November 924Low
Tuesday, November 1016Low
Wednesday, November 118Low

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

Species driving Rio’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 51 (Moderate) 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 Rio now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Rio. The type summary stands: ragweed pollen reads 51 (Moderate) 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

Moderate risk. If you have allergies, consider meds and limit exposure during peak hours.

Keep windows closed at midday; shower after being outside.

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 Wisconsin allergy season guide singles out oak in the south and birch in the north, and a September ragweed peak over the farmland.

Rio allergies today

Rio allergies today are set by the same reading as the Rio pollen count today: the Total Pollen Index is 39 (Low), and the ragweed pollen index on this page is 51 (Moderate) of it. When people ask about Rio allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Rio.

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

Rio tree pollen count

Rio grass pollen count

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

See Rio on the pollen map

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

Wisconsin allergy season guide

Ragweed season

Find an allergist in Rio, WI

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).