Grass Pollen Count in McHenry, IL

Pollen by type in McHenry

• McHenry tree pollen count
• McHenry ragweed pollen count
• McHenry pollen count

What is the grass pollen count in McHenry today?

The McHenry grass pollen index today is 1 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

McHenry’s overall pollen count today is 35 (Low) across all types. See the full McHenry pollen count for the overall index and every type together.

McHenry is a city in McHenry County, Illinois. Its population is 27,774 (ACS 2023).

McHenry Grass Pollen Count: 5-Day Forecast

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

Species driving McHenry’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 McHenry is 1 (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 Illinois allergy season guide singles out the classic tree, grass and ragweed sequence at full strength, with mold as a Chicago co-headliner.

Plants affecting McHenry now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for McHenry. The type summary stands: grass pollen reads 1 (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 Illinois allergy season guide singles out the classic tree, grass and ragweed sequence at full strength, with mold as a Chicago co-headliner.

McHenry allergies today

McHenry allergies today are set by the same reading as the McHenry pollen count today: the Total Pollen Index is 35 (Low), and the grass pollen index on this page is 1 (Low) of it. When people ask about McHenry allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for McHenry.

Allergies in McHenry follow the Illinois calendar set out on the full McHenry 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 McHenry 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 McHenry allergy forecast for the grass pollen season: it shows whether McHenry 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.