Ragweed Pollen Count in Lake Nacimiento, CA — Today

Updated Saturday, November 7, 2026

Pollen by type in Lake Nacimiento

What is the ragweed pollen count in Lake Nacimiento today?

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

Modelled pollen risk index — not a measured count.

Ragweed pollen is the dominant allergen in Lake Nacimiento today. See the full Lake Nacimiento pollen count for the overall index and every type together.

Lake Nacimiento Ragweed Pollen Count: 5-Day Forecast

DayOverall indexCategory
Saturday, November 718Low
Sunday, November 817Low
Monday, November 917Low
Tuesday, November 1018Low
Wednesday, November 1118Low

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 Lake Nacimiento’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving Lake Nacimiento’s ragweed 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: ragweed pollen reads 20 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

How to read this: the “ragweed” figure on this site is the modelled weed pollen index — the weed group (ragweed + mugwort) — printed under the ragweed name the rankings use.

Plants affecting Lake Nacimiento now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for Lake Nacimiento. The type summary stands: ragweed 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 ragweed pollen level means

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

Enjoy outdoor activities.

Weeds follow in late summer and fall, stronger after wet winters. This month sits outside the usual ragweed pollen window for the California pattern, so today’s ragweed 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.

Lake Nacimiento allergies today

Lake Nacimiento allergies today are set by the same reading as the Lake Nacimiento pollen count today: the Total Pollen Index is 18 (Low), and the ragweed pollen index on this page is 20 (Low) of it. When people ask about Lake Nacimiento allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Lake Nacimiento.

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

Lake Nacimiento tree pollen count

Lake Nacimiento grass pollen count

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

See Lake Nacimiento on the pollen map

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

California allergy season guide

Ragweed season

Find an allergist in Lake Nacimiento, 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).