Tree Pollen Count in Hiroshima, Japan

Last updated Friday, November 6, 2026

This page shows the most recent reading available for Hiroshima — from Friday, November 6, 2026 (1 day ago) — not today's reading.

Pollen by type in Hiroshima

What is the tree pollen count in Hiroshima today?

The Hiroshima tree pollen index today is 2 (Low) on Pollen Atlas’s modelled 0–100 scale. Low

Modelled pollen risk index — not a measured count.

Hiroshima’s overall pollen count today is 19 (Low) across all types. See the full Hiroshima pollen count for the overall index and every type together.

Hiroshima is in Hiroshima-shi, Hiroshima, Japan. Its population is 1,200,754 (GeoNames).

Hiroshima Tree Pollen Count: 5-Day Forecast

DayOverall indexCategory
Friday, November 619Low
Saturday, November 717Low
Sunday, November 819Low
Monday, November 916Low
Tuesday, November 1016Low

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 Hiroshima’s overall trend across the week. Today’s tree pollen reading is the headline above.

Species driving Hiroshima’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 2 (Low) today. The plant-by-plant detail that is available, from the Google Pollen API, is in the next section.

Plants affecting Hiroshima now — tree pollen

Detailed plant-by-plant readings for the tree pollen category were not returned in today’s source data for Hiroshima. The type summary stands: tree pollen reads 2 (Low) today.

In the Global pattern, the plants that shape this city’s year vary with its local climate and vegetation, and no single regional calendar is published for this area — 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.

Tree pollen seasons vary with local climate and vegetation, so this page reports the measured readings first and treats any calendar as background only. No regional calendar is asserted for this area, so today’s tree pollen reading is reported as a modelled index value, without placing this month inside or outside a regional window. No Japan allergy season guide is published yet, so the seasonal context here follows the Global regional pattern.

Hiroshima allergies today

Hiroshima allergies today are set by the same reading as the Hiroshima pollen count today: the Total Pollen Index is 19 (Low), and the tree pollen index on this page is 2 (Low) of it. When people ask about Hiroshima allergies, this is the number that answers them — one daily modelled index built from today’s tree, grass and weed index values for Hiroshima.

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

Hiroshima grass pollen count

Hiroshima ragweed pollen count

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

See Hiroshima on the pollen map

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

Worst cities for allergies

Tree pollen season

Find an allergist in Hiroshima, Japan

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).