Name: Pollen forecast for Yokohama (2026-10-23)
Creator: Pollen Count
Published: 2026-10-22T15:56:57Z
License: https://pollencount.org/terms/

The pollen count in Yokohama today is high, driven mainly by Grass (mixed).

HIGH

12 active species

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed LOW

Afternoon

Grass HIGH

Tree LOW

Weed LOW

Evening

Grass LOW

Tree LOW

Weed LOW

Species	Level	Count
🌾 Grass (mixed)	HIGH	22 grains/m³
🌾 Bermuda Grass	MED	11 grains/m³
🌾 Cock's-foot	LOW	4 grains/m³
🌿 Ribwort Plantain	LOW	4 grains/m³
🌿 Pellitory-of-the-wall	LOW	3 grains/m³
+35 more tracked Upright Pellitory Pigweed Fat Hen Perennial Ryegrass Timothy Grass Common Sorrel Russian Thistle Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm Stinging Nettle All species in the app: Android iOS
🌾 Grass (mixed)	LOW	3 grains/m³
🌾 Bermuda Grass	LOW	1 grains/m³
🌾 Cock's-foot	LOW	1 grains/m³
🌿 Pellitory-of-the-wall	LOW	1 grains/m³
🌿 Upright Pellitory	LOW	1 grains/m³
+35 more tracked Ribwort Plantain 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 Parthenium Weed 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
🌾 Grass (mixed)	MED	13 grains/m³
🌾 Bermuda Grass	MED	7 grains/m³
🌿 Ribwort Plantain	MED	5 grains/m³
🌿 Pellitory-of-the-wall	LOW	4 grains/m³
🌿 Upright Pellitory	LOW	3 grains/m³
+35 more tracked Pigweed Cock's-foot Mugwort Fat Hen Timothy Grass Common Sorrel Russian Thistle Stinging Nettle Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS

Last updated: 15:56 UTC

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

Map of Yokohama (35.4437°, 139.638°)

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