Ragweed Pollen Count in Harrison Lake, IN — Today

Updated Saturday, November 7, 2026

Pollen by type in Harrison Lake

What is the ragweed pollen count in Harrison Lake today?

The Harrison Lake ragweed pollen index today is 23 (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 Harrison Lake today. See the full Harrison Lake pollen count for the overall index and every type together.

Harrison Lake Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 718Low
Sunday, November 818Low
Monday, November 918Low
Tuesday, November 1018Low
Wednesday, November 1115Low

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

Species driving Harrison Lake’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 23 (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 Harrison Lake now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Harrison Lake. The type summary stands: ragweed pollen reads 23 (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 Indiana allergy season guide singles out ragweed above all — the state’s defining allergen — over a maple, elm and oak spring.

Harrison Lake allergies today

Harrison Lake allergies today are set by the same reading as the Harrison Lake pollen count today: the Total Pollen Index is 18 (Low), and the ragweed pollen index on this page is 23 (Low) of it. When people ask about Harrison Lake allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Harrison Lake.

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

Harrison Lake tree pollen count

Harrison Lake grass pollen count

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

See Harrison Lake on the pollen map

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

Indiana allergy season guide

Ragweed season

Find an allergist in Harrison Lake, IN

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).