Name: Pollen forecast for Hiroshima (2026-10-23)
Creator: Pollen Count
Published: 2026-10-22T15:56:58Z
License: https://pollencount.org/terms/

The pollen count in Hiroshima today is high, driven mainly by Parthenium Weed.

HIGH

8 active species

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed LOW

Afternoon

Grass MED

Tree LOW

Weed HIGH

Evening

Grass LOW

Tree LOW

Weed MED

Species	Level	Count
🌿 Parthenium Weed	HIGH	26 grains/m³
🌾 Grass (mixed)	MED	18 grains/m³
🌾 Bermuda Grass	MED	5 grains/m³
🌿 Ribwort Plantain	LOW	2 grains/m³
🌾 Cock's-foot	LOW	1 grains/m³
+35 more tracked Pellitory-of-the-wall Upright Pellitory Common Sorrel Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Timothy Grass London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌿 Parthenium Weed	MED	5 grains/m³
🌾 Grass (mixed)	LOW	2 grains/m³
🌾 Bermuda Grass	LOW	1 grains/m³
🌿 Ribwort Plantain	LOW	1 grains/m³
🌳 Box Elder	LOW	-
+35 more tracked Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Cock's-foot Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Timothy Grass London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌿 Parthenium Weed	HIGH	17 grains/m³
🌾 Grass (mixed)	MED	9 grains/m³
🌾 Bermuda Grass	LOW	2 grains/m³
🌿 Ribwort Plantain	LOW	2 grains/m³
🌾 Cock's-foot	LOW	1 grains/m³
+35 more tracked Upright Pellitory Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Timothy Grass London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS

Last updated: 15:56 UTC

4-Day Forecast	Tree	Grass	Weed
Fri 23 Oct	LOW	MED	HIGH
Sat 24 Oct	LOW	LOW	MED
Sun 25 Oct	LOW	MED	HIGH

Map of Hiroshima (34.3853°, 132.4553°)

More in Japan

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What Pollen Levels Mean

LOW Symptoms are unlikely

MED Moderate risk of symptoms

HIGH Widespread symptoms likely

V.HI Expect significant symptoms

X.HI Extremely high symptom likelihood & severity