Grass Pollen Count in Heron Lake, MN — Today

Updated Saturday, November 7, 2026

Pollen by type in Heron Lake

What is the grass pollen count in Heron Lake today?

The Heron Lake grass pollen index today is 0.6 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Heron Lake’s overall pollen count today is 22 (Low) across all types. See the full Heron Lake pollen count for the overall index and every type together.

Heron Lake Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 722Low
Sunday, November 817Low
Monday, November 911Low
Tuesday, November 105Low
Wednesday, November 115Low

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 Heron Lake’s overall trend across the week. Today’s grass pollen reading is the headline above.

Species driving Heron Lake’s grass pollen

The modelled data reports grass as one combined index — there is no species-by-species split for grass anywhere in the data, so this page does not invent one. Today’s modelled grass index for Heron Lake is 0.6 (Low), and the 5-day overall trend above shows the shape of the week.

As regional context only — not as today’s readings — 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.

The Minnesota allergy season guide singles out birch, a signature northern spring pollen, and southern-Minnesota ragweed.

Plants affecting Heron Lake now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Heron Lake. The type summary stands: grass pollen reads 0.6 (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 grass pollen level means

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

Enjoy outdoor activities.

Grasses hold from May through July. This month sits outside the usual grass pollen window for the Midwest & Great Lakes pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The Minnesota allergy season guide singles out birch, a signature northern spring pollen, and southern-Minnesota ragweed.

Heron Lake allergies today

Heron Lake allergies today are set by the same reading as the Heron Lake pollen count today: the Total Pollen Index is 22 (Low), and the grass pollen index on this page is 0.6 (Low) of it. When people ask about Heron Lake allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Heron Lake.

Allergies in Heron Lake follow the Minnesota calendar set out on the full Heron 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 Heron Lake before heading outdoors, the grass 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 Heron Lake allergy forecast for the grass pollen season: it shows whether Heron 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 Heron Lake pollen count — all types, the overall index and today’s ranking context

Heron Lake tree pollen count

Heron Lake ragweed pollen count

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

See Heron Lake on the pollen map

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

Minnesota allergy season guide

Grass pollen season

Find an allergist in Heron Lake, MN

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).