Name: Pollen forecast for Boston (2026-08-31)
Creator: Pollen Count
Published: 2026-09-01T09:02:26Z
License: https://pollencount.org/terms/

The pollen count in Boston 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	35 grains/m³
🌿 Common Ragweed	HIGH	28 grains/m³
🌿 Western Ragweed	MED	14 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 Pigweed Fat Hen Ribwort Plantain Russian Thistle 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	MED	8 grains/m³
🌿 Common Ragweed	MED	6 grains/m³
🌿 Western Ragweed	LOW	3 grains/m³
🌿 Mugwort	LOW	3 grains/m³
🌿 Pellitory-of-the-wall	LOW	2 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Pigweed Fat Hen Bermuda Grass Cock's-foot Perennial Ryegrass Timothy Grass Ribwort Plantain Grass (mixed) Common Sorrel Russian Thistle 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	33 grains/m³
🌿 Common Ragweed	HIGH	26 grains/m³
🌿 Western Ragweed	MED	13 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 Stinging Nettle Pigweed Fat Hen Ribwort Plantain Russian Thistle 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	HIGH	22 grains/m³
🌿 Common Ragweed	HIGH	18 grains/m³
🌿 Western Ragweed	MED	9 grains/m³
🌿 Mugwort	MED	8 grains/m³
🌿 Pellitory-of-the-wall	MED	5 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Pigweed Fat Hen Cock's-foot Perennial Ryegrass Timothy Grass Ribwort Plantain Grass (mixed) Russian Thistle Bermuda Grass 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: 09:02 UTC

4-Day Forecast	Tree	Grass	Weed
Mon 31 Aug	LOW	MED	V.HI
Tue 1 Sep	LOW	LOW	MED
Wed 2 Sep	LOW	MED	V.HI
Thu 3 Sep	LOW	LOW	HIGH

Map of Boston (42.3601°, -71.0589°)

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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