Name: Pollen forecast for Bolton (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:08Z
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 high, driven mainly by Mugwort.

HIGH

13 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed HIGH

Evening

Grass LOW

Tree LOW

Weed HIGH

Species	Level	Count
🌿 Mugwort	HIGH	27 grains/m³
🌿 Western Ragweed	MED	12 grains/m³
🌿 Giant Ragweed	MED	9 grains/m³
🌿 Stinging Nettle	MED	7 grains/m³
🌾 Perennial Ryegrass	MED	6 grains/m³
+35 more tracked Grass (mixed) Pigweed Fat Hen Cock's-foot Timothy Grass Ribwort Plantain Russian Thistle Common Sorrel Box Elder Alder Common Ragweed 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
🌿 Mugwort	MED	11 grains/m³
🌿 Western Ragweed	MED	5 grains/m³
🌾 Grass (mixed)	MED	5 grains/m³
🌾 Cock's-foot	LOW	4 grains/m³
🌾 Perennial Ryegrass	LOW	4 grains/m³
+35 more tracked Timothy Grass Giant Ragweed Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Russian Thistle Box Elder Alder Common Ragweed 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
🌿 Mugwort	HIGH	17 grains/m³
🌿 Western Ragweed	MED	8 grains/m³
🌿 Giant Ragweed	MED	5 grains/m³
🌿 Fat Hen	LOW	4 grains/m³
🌿 Stinging Nettle	LOW	4 grains/m³
+35 more tracked Pigweed Perennial Ryegrass Ribwort Plantain Grass (mixed) Common Sorrel Russian Thistle Cock's-foot Timothy Grass Box Elder Alder Common Ragweed 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
🌿 Mugwort	MED	9 grains/m³
🌿 Western Ragweed	LOW	4 grains/m³
🌿 Giant Ragweed	LOW	3 grains/m³
🌿 Pigweed	LOW	2 grains/m³
🌿 Fat Hen	LOW	2 grains/m³
+35 more tracked Ribwort Plantain Grass (mixed) Russian Thistle Stinging Nettle Cock's-foot Perennial Ryegrass Timothy Grass Common Sorrel Box Elder Alder Common Ragweed 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: 14:18 UTC

4-Day Forecast	Tree	Grass	Weed
Sat 17 Oct	LOW	MED	HIGH
Sun 18 Oct	LOW	MED	MED
Mon 19 Oct	LOW	LOW	HIGH
Tue 20 Oct	LOW	LOW	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