Tree Pollen Count in Los Altos Hills, CA — Today

Pollen by type in Los Altos Hills

• Los Altos Hills grass pollen count
• Los Altos Hills ragweed pollen count
• Los Altos Hills pollen count

What is the tree pollen count in Los Altos Hills today?

The Los Altos Hills tree pollen index today is 29 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

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

Los Altos Hills Tree 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 Los Altos Hills’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Los Altos Hills’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 29 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Los Altos Hills now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Los Altos Hills. The type summary stands: tree pollen reads 29 (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.

Los Altos Hills allergies today

Los Altos Hills allergies today are set by the same reading as the Los Altos Hills pollen count today: the Total Pollen Index is 25 (Low), and the tree pollen index on this page is 29 (Low) of it. When people ask about Los Altos Hills allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Los Altos Hills.

Allergies in Los Altos Hills follow the California calendar set out on the full Los Altos Hills 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 Los Altos Hills 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 Los Altos Hills allergy forecast for the tree pollen season: it shows whether Los Altos Hills 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.