Name: Pollen forecast for Bolton (2026-09-01)
Creator: Pollen Count
Published: 2026-09-01T15:30:20Z
License: https://pollencount.org/terms/

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About Pollen in Bolton

Bolton’s spring allergy profile, March-May, is dominated by early-flowering Birch and Alder from Queens Park and residential street trees; followed by Oak and Sycamore pollen, particularly from Leverhulme Park and Rivington Pike woodlands, extending into June. Peak summer sees widespread Grass pollen (June-July) originating from Moses Gate Country Park meadows and surrounding agricultural lands.

The urban valley topography, often humid, can trap and concentrate pollen locally. Late autumn brings heightened mould spore exposure (September-November) from damp leaf litter decomposition in parks and shaded residential areas, exacerbated by Bolton’s high rainfall.

The pollen count in Bolton today is MED, driven mainly by Grass (mixed).

MED

14 active species

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed MED

Evening

Grass LOW

Tree LOW

Weed MED

Species	Level	Count
🌾 Grass (mixed)	MED	17 grains/m³
🌾 Timothy Grass	MED	16 grains/m³
🌿 Common Ragweed	MED	13 grains/m³
🌿 Giant Ragweed	MED	13 grains/m³
🌾 Cock's-foot	MED	13 grains/m³
+35 more tracked Perennial Ryegrass Stinging Nettle Fat Hen Pigweed Russian Thistle Mugwort Ribwort Plantain Common Sorrel Western Ragweed Box Elder Alder Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Common Ragweed	MED	8 grains/m³
🌿 Giant Ragweed	MED	8 grains/m³
🌿 Fat Hen	MED	6 grains/m³
🌿 Stinging Nettle	MED	6 grains/m³
🌿 Pigweed	MED	5 grains/m³
+35 more tracked Russian Thistle Mugwort Timothy Grass Ribwort Plantain Grass (mixed) Cock's-foot Perennial Ryegrass Common Sorrel Western Ragweed Box Elder Alder Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Common Ragweed	MED	12 grains/m³
🌿 Giant Ragweed	MED	12 grains/m³
🌾 Grass (mixed)	MED	12 grains/m³
🌾 Timothy Grass	MED	11 grains/m³
🌾 Cock's-foot	MED	9 grains/m³
+35 more tracked Stinging Nettle Fat Hen Perennial Ryegrass Pigweed Russian Thistle Mugwort Ribwort Plantain Common Sorrel Western Ragweed Box Elder Alder Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌾 Timothy Grass	MED	10 grains/m³
🌾 Grass (mixed)	MED	10 grains/m³
🌾 Cock's-foot	MED	8 grains/m³
🌾 Perennial Ryegrass	MED	8 grains/m³
🌿 Common Ragweed	MED	7 grains/m³
+35 more tracked Giant Ragweed Stinging Nettle Fat Hen Pigweed Mugwort Russian Thistle Ribwort Plantain Common Sorrel Western Ragweed Box Elder Alder Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS

Last updated: 15:30 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 1 Sep	LOW	MED	MED
Wed 2 Sep	LOW	LOW	MED
Thu 3 Sep	LOW	MED	MED
Fri 4 Sep	LOW	MED	MED

Map of Bolton (53.635147°, -2.449409°)

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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