Ragweed Pollen Count in National City, CA — Today

Pollen by type in National City

• National City tree pollen count
• National City grass pollen count
• National City pollen count

What is the ragweed pollen count in National City today?

The National City ragweed pollen index today is 43 (Moderate) on Pollen Atlas’s modelled 0–100 scale. Moderate

Modelled pollen risk index — not a measured count.

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

National City is a city in San Diego County, California. Its population is 55,960 (ACS 2023).

National City Ragweed 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 National City’s overall trend across the week. Today’s ragweed pollen reading is the headline above.

Species driving National City’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 43 (Moderate) 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 National City now — ragweed pollen

Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for National City. The type summary stands: ragweed pollen reads 43 (Moderate) 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

Moderate risk. If you have allergies, consider meds and limit exposure during peak hours.

Keep windows closed at midday; shower after being outside.

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.

National City allergies today

National City allergies today are set by the same reading as the National City pollen count today: the Total Pollen Index is 36 (Low), and the ragweed pollen index on this page is 43 (Moderate) of it. When people ask about National City allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for National City.

Allergies in National City follow the California calendar set out on the full National City 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 National City 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 National City allergy forecast for the ragweed pollen season: it shows whether National City 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.