Tree Pollen Count in Hartland, CA — Today

Updated Saturday, November 7, 2026

Pollen by type in Hartland

What is the tree pollen count in Hartland today?

The Hartland tree pollen index today is 20 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Hartland’s overall pollen count today is 17 (Low) across all types. See the full Hartland pollen count for the overall index and every type together.

Hartland Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 717Low
Sunday, November 816Low
Monday, November 916Low
Tuesday, November 1016Low
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 Hartland’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Hartland’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 20 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Hartland now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Hartland. The type summary stands: tree pollen reads 20 (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.

Hartland allergies today

Hartland allergies today are set by the same reading as the Hartland pollen count today: the Total Pollen Index is 17 (Low), and the tree pollen index on this page is 20 (Low) of it. When people ask about Hartland allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Hartland.

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

Hartland grass pollen count

Hartland ragweed pollen count

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

See Hartland 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 Hartland, 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).