Name: Pollen forecast for San Jose (2026-09-07)
Creator: Pollen Count
Published: 2026-09-07T16:34:27Z
License: https://pollencount.org/terms/

The pollen count in San Jose today is HIGH, driven mainly by Giant Ragweed.

HIGH

17 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed LOW

Afternoon

Grass MED

Tree LOW

Weed HIGH

Evening

Grass MED

Tree LOW

Weed V.HI

Species	Level	Count
🌿 Giant Ragweed	HIGH	29 grains/m³
🌿 Western Ragweed	HIGH	22 grains/m³
🌾 Grass (mixed)	MED	19 grains/m³
🌾 Bermuda Grass	MED	13 grains/m³
🌾 Cock's-foot	MED	10 grains/m³
+35 more tracked Sagebrush Pellitory-of-the-wall Russian Thistle Pigweed Mugwort Fat Hen Timothy Grass Perennial Ryegrass Upright Pellitory Ribwort Plantain Common Sorrel Stinging Nettle Box Elder Alder Common Ragweed 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 All species in the app: Android iOS
🌿 Giant Ragweed	V.HI	38 grains/m³
🌿 Western Ragweed	HIGH	29 grains/m³
🌾 Grass (mixed)	HIGH	27 grains/m³
🌾 Bermuda Grass	MED	19 grains/m³
🌾 Cock's-foot	MED	15 grains/m³
+35 more tracked Sagebrush Pellitory-of-the-wall Russian Thistle Pigweed Fat Hen Timothy Grass Mugwort Perennial Ryegrass Upright Pellitory Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed 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 All species in the app: Android iOS
🌿 Giant Ragweed	X.HI	83 grains/m³
🌿 Western Ragweed	X.HI	64 grains/m³
🌾 Grass (mixed)	HIGH	49 grains/m³
🌾 Bermuda Grass	HIGH	34 grains/m³
🌾 Cock's-foot	HIGH	27 grains/m³
+35 more tracked Sagebrush Pellitory-of-the-wall Russian Thistle Pigweed Fat Hen Mugwort Upright Pellitory Ribwort Plantain Timothy Grass Perennial Ryegrass Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed 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 All species in the app: Android iOS
🌿 Giant Ragweed	X.HI	55 grains/m³
🌿 Western Ragweed	V.HI	42 grains/m³
🌾 Grass (mixed)	HIGH	33 grains/m³
🌾 Bermuda Grass	HIGH	23 grains/m³
🌾 Cock's-foot	MED	18 grains/m³
+35 more tracked Sagebrush Pellitory-of-the-wall Russian Thistle Pigweed Fat Hen Mugwort Upright Pellitory Perennial Ryegrass Timothy Grass Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed 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 All species in the app: Android iOS

Last updated: 16:34 UTC

4-Day Forecast	Tree	Grass	Weed
Mon 7 Sep	LOW	MED	HIGH
Tue 8 Sep	LOW	HIGH	V.HI
Wed 9 Sep	LOW	HIGH	X.HI
Thu 10 Sep	LOW	HIGH	X.HI

Map of San Jose (37.3382°, -121.8863°)

More in United States

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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