Name: Pollen forecast for Philadelphia (2026-09-07)
Creator: Pollen Count
Published: 2026-09-07T16:34:26Z
License: https://pollencount.org/terms/

The pollen count in Philadelphia today is V.HI, driven mainly by Giant Ragweed.

V.HI

17 active species

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed V.HI

Evening

Grass MED

Tree LOW

Weed X.HI

Species	Level	Count
🌿 Giant Ragweed	V.HI	42 grains/m³
🌿 Common Ragweed	HIGH	22 grains/m³
🌿 Western Ragweed	HIGH	18 grains/m³
🌿 Mugwort	MED	10 grains/m³
🌾 Perennial Ryegrass	MED	10 grains/m³
+35 more tracked Grass (mixed) Cock's-foot Timothy Grass Bermuda Grass Pellitory-of-the-wall Upright Pellitory Pigweed Fat Hen Russian Thistle Stinging Nettle Ribwort Plantain Common Sorrel Box Elder Alder Sagebrush 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	54 grains/m³
🌿 Common Ragweed	HIGH	29 grains/m³
🌿 Western Ragweed	HIGH	23 grains/m³
🌾 Perennial Ryegrass	MED	16 grains/m³
🌾 Grass (mixed)	MED	16 grains/m³
+35 more tracked Mugwort Cock's-foot Timothy Grass Bermuda Grass Pellitory-of-the-wall Upright Pellitory Pigweed Fat Hen Ribwort Plantain Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Sagebrush 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	64 grains/m³
🌿 Common Ragweed	V.HI	34 grains/m³
🌿 Western Ragweed	HIGH	27 grains/m³
🌿 Mugwort	HIGH	16 grains/m³
🌾 Grass (mixed)	MED	16 grains/m³
+35 more tracked Perennial Ryegrass Cock's-foot Timothy Grass Bermuda Grass Pellitory-of-the-wall Upright Pellitory Stinging Nettle Pigweed Fat Hen Russian Thistle Ribwort Plantain Common Sorrel Box Elder Alder Sagebrush 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	90 grains/m³
🌿 Common Ragweed	V.HI	49 grains/m³
🌿 Western Ragweed	V.HI	39 grains/m³
🌿 Mugwort	HIGH	23 grains/m³
🌾 Perennial Ryegrass	MED	18 grains/m³
+35 more tracked Grass (mixed) Cock's-foot Timothy Grass Pellitory-of-the-wall Bermuda Grass Upright Pellitory Stinging Nettle Pigweed Fat Hen Russian Thistle Ribwort Plantain Common Sorrel Box Elder Alder Sagebrush 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	V.HI
Tue 8 Sep	LOW	MED	X.HI
Wed 9 Sep	LOW	MED	X.HI
Thu 10 Sep	LOW	MED	X.HI

Map of Philadelphia (39.9526°, -75.1652°)

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