Tree Pollen Count in Rosemont, CA

Last updated Friday, November 6, 2026

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

Pollen by type in Rosemont

What is the tree pollen count in Rosemont today?

The Rosemont tree pollen index today is 23 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Rosemont’s overall pollen count today is 25 (Low) across all types. See the full Rosemont pollen count for the overall index and every type together.

Rosemont is a census-designated place in Sacramento County, California. Its population is 23,448 (ACS 2023).

Rosemont Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 625Low
Saturday, November 725Low
Sunday, November 824Low
Monday, November 927Low
Tuesday, November 1026Low

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 Rosemont’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Rosemont’s tree 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: tree pollen reads 23 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Rosemont now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Rosemont. The type summary stands: tree pollen reads 23 (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 tree pollen level means

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

Enjoy outdoor activities.

Trees build through spring, with planted olive peaking from March into May. This month sits outside the usual tree pollen window for the California pattern, so today’s tree 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.

Rosemont allergies today

Rosemont allergies today are set by the same reading as the Rosemont pollen count today: the Total Pollen Index is 25 (Low), and the tree pollen index on this page is 23 (Low) of it. When people ask about Rosemont allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Rosemont.

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

Rosemont grass pollen count

Rosemont ragweed pollen count

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

See Rosemont on the pollen map

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

California allergy season guide

Tree pollen season

Find an allergist in Rosemont, 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).