Ragweed Pollen Count in South Monrovia Island, CA — Today
Updated Saturday, November 7, 2026
This reading is the forecast point for South Monrovia Island — 2 nearby places use the same point; South Monrovia Island is 1.5 km from it.
Pollen by type in South Monrovia Island
What is the ragweed pollen count in South Monrovia Island today?
The South Monrovia Island ragweed pollen index today is 30 (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 South Monrovia Island today. See the full South Monrovia Island pollen count for the overall index and every type together.
South Monrovia Island Ragweed Pollen Count: 5-Day Forecast
| Day | Overall index | Category |
|---|---|---|
| Saturday, November 7 | 27 | Low |
| Sunday, November 8 | 24 | Low |
| Monday, November 9 | 24 | Low |
| Tuesday, November 10 | 26 | Low |
| Wednesday, November 11 | 23 | Low |
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 South Monrovia Island’s overall trend across the week. Today’s ragweed pollen reading is the headline above.
Species driving South Monrovia Island’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 30 (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 South Monrovia Island now — ragweed pollen
Detailed plant-by-plant readings for the ragweed pollen category were not returned in today’s source data for South Monrovia Island. The type summary stands: ragweed pollen reads 30 (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.
South Monrovia Island allergies today
South Monrovia Island allergies today are set by the same reading as the South Monrovia Island pollen count today: the Total Pollen Index is 27 (Low), and the ragweed pollen index on this page is 30 (Low) of it. When people ask about South Monrovia Island allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for South Monrovia Island.
Allergies in South Monrovia Island follow the California calendar set out on the full South Monrovia Island 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 South Monrovia Island 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 South Monrovia Island allergy forecast for the ragweed pollen season: it shows whether South Monrovia Island 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.
South Monrovia Island tree pollen count
South Monrovia Island grass pollen count
See South Monrovia Island on the pollen map
Every pollen type, with photos and seasons: the pollen directory
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).