Name: Pollen forecast for Wrexham (2026-05-20)
Creator: Pollen Count
Published: 2026-05-20T14:03:07Z
License: https://pollencount.org/terms/

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About Pollen in Wrexham

Wrexham’s allergy profile begins March-May with high birch pollen, sourced from urban trees and Erddig Estate woodlands; oak pollen follows April-June, pervasive in local parks and surrounding deciduous forests. Summer (May-July) experiences peak grass pollen counts, predominantly from Clywedog Trail meadows and adjacent agricultural land.

Wrexham’s basin-like topography can concentrate airborne pollen, exacerbating exposure. Late-season mould spores (September-November) proliferate from damp leaf litter in areas like Bellevue Park, intensified by the region’s moist climate.

HIGH

10 active species

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4-Day Forecast:

Morning

Grass LOW

Tree V.HI

Weed LOW

Afternoon

Grass LOW

Tree HIGH

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Ash	HIGH	50 grains/m³
🌳 Field Elm	MED	40 grains/m³
🌳 Silver Birch	MED	38 grains/m³
🌳 Alder	MED	26 grains/m³
🌳 Black Poplar	MED	25 grains/m³
+35 more tracked Box Elder Downy Birch Paper Birch English Oak White Oak Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Ash	HIGH	77 grains/m³
🌳 Field Elm	HIGH	63 grains/m³
🌳 Silver Birch	HIGH	60 grains/m³
🌳 Alder	MED	40 grains/m³
🌳 Black Poplar	MED	39 grains/m³
+35 more tracked Box Elder Downy Birch Paper Birch English Oak White Oak Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Ash	HIGH	57 grains/m³
🌳 Field Elm	MED	46 grains/m³
🌳 Silver Birch	MED	44 grains/m³
🌳 Alder	MED	30 grains/m³
🌳 Box Elder	MED	28 grains/m³
+35 more tracked Black Poplar Downy Birch Paper Birch English Oak White Oak Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Ash	HIGH	67 grains/m³
🌳 Field Elm	HIGH	54 grains/m³
🌳 Silver Birch	HIGH	52 grains/m³
🌳 Alder	MED	35 grains/m³
🌳 Box Elder	MED	33 grains/m³
+35 more tracked Black Poplar Downy Birch Paper Birch English Oak White Oak Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Mugwort Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Cock's-foot Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Holm Oak Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS

Last updated: 14:03 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	HIGH	LOW	LOW
Thu 21 May	HIGH	LOW	LOW
Fri 22 May	HIGH	LOW	LOW
Sat 23 May	HIGH	LOW	LOW

Map of Wrexham (53.051448°, -2.987761°)

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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