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

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About Pollen in Warrington

Warrington’s spring pollen season, March-May, is dominated by Birch, Oak, and Ash; peak concentrations emanate from urban woodlands like Sankey Valley Park and Walton Hall Gardens. Summer, May-July, sees high grass pollen from abundant riverine meadows along the Mersey and open parklands.

The city’s basin topography and dense urbanisation can trap airborne particulates, elevating localised pollen counts; late autumn to winter brings mould spores, exacerbated by damp leaf litter decomposition in wooded areas and wetlands such as Risley Moss.

V.HI

9 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass LOW

Tree V.HI

Weed LOW

Afternoon

Grass LOW

Tree V.HI

Weed LOW

Evening

Grass LOW

Tree MED

Weed LOW

Species	Level	Count
🌳 Paper Birch	V.HI	108 grains/m³
🌳 Downy Birch	V.HI	105 grains/m³
🌳 English Oak	HIGH	98 grains/m³
🌳 Silver Birch	HIGH	90 grains/m³
🌳 White Oak	HIGH	65 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Alder 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 Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 Paper Birch	HIGH	99 grains/m³
🌳 Downy Birch	HIGH	96 grains/m³
🌳 English Oak	HIGH	90 grains/m³
🌳 Silver Birch	HIGH	82 grains/m³
🌳 White Oak	HIGH	59 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Alder 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 Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 Paper Birch	V.HI	103 grains/m³
🌳 Downy Birch	V.HI	100 grains/m³
🌳 English Oak	HIGH	93 grains/m³
🌳 Silver Birch	HIGH	85 grains/m³
🌳 White Oak	HIGH	61 grains/m³
+35 more tracked Holm Oak London Plane Black Poplar Box Elder Ribwort Plantain Alder 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 Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS
🌳 Paper Birch	HIGH	67 grains/m³
🌳 Downy Birch	HIGH	66 grains/m³
🌳 English Oak	HIGH	61 grains/m³
🌳 Silver Birch	HIGH	56 grains/m³
🌳 White Oak	MED	40 grains/m³
+35 more tracked Holm Oak London Plane Box Elder Black Poplar Alder 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 Ash Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain Grass (mixed) Mesquite Common Sorrel Russian Thistle Field Elm Stinging Nettle All species in the app: Android iOS

Last updated: 14:03 UTC

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

Map of Warrington (53.399218°, -2.674576°)

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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