Name: Pollen forecast for Lancaster (2026-09-01)
Creator: Pollen Count
Published: 2026-09-01T15:30:35Z
License: https://pollencount.org/terms/

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About Pollen in Lancaster

Birch pollen peaks March-April, highly concentrated in Williamson Park and Lancaster University grounds; Oak pollen follows into May, prominent across urban woodland fringes; Grass pollen dominates June-July, sourced from River Lune floodplains, canal towpaths, and adjacent agricultural fields.

Lancaster’s valley topography and Morecambe Bay proximity can concentrate pollen locally; autumnal mould spores increase September-November, driven by damp leaf litter decomposition in parks and shaded urban spaces.

The pollen count in Lancaster today is MED, driven mainly by Common Ragweed.

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
🌿 Common Ragweed	MED	13 grains/m³
🌿 Giant Ragweed	MED	12 grains/m³
🌾 Grass (mixed)	MED	12 grains/m³
🌾 Timothy Grass	MED	11 grains/m³
🌿 Mugwort	MED	10 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Stinging Nettle Fat Hen Pigweed 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
🌿 Common Ragweed	MED	8 grains/m³
🌿 Giant Ragweed	MED	7 grains/m³
🌿 Mugwort	MED	6 grains/m³
🌾 Grass (mixed)	MED	5 grains/m³
🌿 Stinging Nettle	MED	5 grains/m³
+35 more tracked Fat Hen Cock's-foot Timothy Grass Russian Thistle Pigweed Perennial Ryegrass 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	12 grains/m³
🌿 Giant Ragweed	MED	12 grains/m³
🌿 Mugwort	MED	10 grains/m³
🌾 Grass (mixed)	MED	8 grains/m³
🌿 Stinging Nettle	MED	8 grains/m³
+35 more tracked Fat Hen Timothy Grass Pigweed Cock's-foot Russian Thistle Perennial Ryegrass 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
🌾 Grass (mixed)	MED	7 grains/m³
🌿 Common Ragweed	MED	6 grains/m³
🌿 Giant Ragweed	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌿 Mugwort	MED	5 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Stinging Nettle Pigweed Fat Hen 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	MED	MED
Thu 3 Sep	LOW	MED	MED
Fri 4 Sep	LOW	MED	MED

Map of Lancaster (54.043863°, -2.795905°)

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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