Grass Pollen Count in Irwindale, CA

Last updated Friday, November 6, 2026

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

Pollen by type in Irwindale

What is the grass pollen count in Irwindale today?

The Irwindale grass pollen index today is 4 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Irwindale’s overall pollen count today is 27 (Low) across all types. See the full Irwindale pollen count for the overall index and every type together.

Irwindale Grass Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 627Low
Saturday, November 724Low
Sunday, November 824Low
Monday, November 924Low
Tuesday, November 1024Low

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

Species driving Irwindale’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 Irwindale is 4 (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 California pattern, the plants that typically shape this city’s year are winter and spring trees, late-spring grasses and late-summer weeds.

The California allergy season guide singles out planted olive and the Central Valley’s concentrated spring pollen.

Plants affecting Irwindale now — grass pollen

Detailed plant-by-plant readings for the grass pollen category were not returned in today’s source data for Irwindale. The type summary stands: grass pollen reads 4 (Low) today.

In the California pattern, the plants that typically shape this city’s year are winter and spring trees, late-spring grasses and late-summer weeds — 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 peak in spring in the Central Valley and run longer and milder on the coast. This month sits outside the usual grass pollen window for the California pattern, so today’s grass pollen reading is the modelled value outranking the calendar — this page reports the modelled reading first. The California allergy season guide singles out planted olive and the Central Valley’s concentrated spring pollen.

Irwindale allergies today

Irwindale allergies today are set by the same reading as the Irwindale pollen count today: the Total Pollen Index is 27 (Low), and the grass pollen index on this page is 4 (Low) of it. When people ask about Irwindale allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Irwindale.

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

Irwindale tree pollen count

Irwindale ragweed pollen count

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

See Irwindale on the pollen map

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

California allergy season guide

Grass pollen season

Find an allergist in Irwindale, CA

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).