Name: Pollen forecast for Pittsburgh (2026-09-07)
Creator: Pollen Count
Published: 2026-09-07T16:34:29Z
License: https://pollencount.org/terms/

The pollen count in Pittsburgh 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	33 grains/m³
🌿 Common Ragweed	HIGH	22 grains/m³
🌿 Western Ragweed	MED	14 grains/m³
🌾 Cock's-foot	MED	10 grains/m³
🌾 Perennial Ryegrass	MED	10 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Mugwort 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	V.HI	46 grains/m³
🌿 Common Ragweed	V.HI	30 grains/m³
🌿 Western Ragweed	HIGH	20 grains/m³
🌿 Mugwort	MED	12 grains/m³
🌾 Perennial Ryegrass	MED	12 grains/m³
+35 more tracked Grass (mixed) Cock's-foot Timothy Grass Bermuda Grass Pellitory-of-the-wall Upright Pellitory Russian Thistle Stinging Nettle Pigweed Fat Hen 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	V.HI	49 grains/m³
🌿 Common Ragweed	V.HI	32 grains/m³
🌿 Western Ragweed	HIGH	21 grains/m³
🌿 Mugwort	MED	13 grains/m³
🌾 Perennial Ryegrass	MED	11 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Cock's-foot Bermuda Grass Pellitory-of-the-wall Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed 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	V.HI	30 grains/m³
🌿 Common Ragweed	HIGH	19 grains/m³
🌿 Western Ragweed	MED	13 grains/m³
🌿 Mugwort	MED	8 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
+35 more tracked Perennial Ryegrass Pellitory-of-the-wall Timothy Grass Grass (mixed) Bermuda Grass Upright Pellitory Russian Thistle Stinging Nettle Pigweed Fat Hen 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	V.HI
Wed 9 Sep	LOW	MED	V.HI
Thu 10 Sep	LOW	MED	V.HI

Map of Pittsburgh (40.4406°, -79.9959°)

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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