Name: Pollen forecast for Halifax (2026-05-20)
Creator: Pollen Count
Published: 2026-05-20T14:02:53Z
License: https://pollencount.org/terms/

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About Pollen in Halifax

Halifax experiences peak spring tree pollen (Birch, Oak) March-May, originating from mature specimens within Shibden Park, People’s Park, and surrounding valley woodlands; summer sees high grass pollen counts June-July, prevalent across Calder Valley meadows and local parklands like Manor Heath Park. The city’s valley topography often traps airborne allergens, intensifying local pollen levels; late-season mould spores August-October are prevalent due to Halifax’s damp climate and decomposing leaf litter in wooded areas.

V.HI

11 active species

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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
🌳 Silver Birch	V.HI	101 grains/m³
🌳 Ash	HIGH	88 grains/m³
🌳 Downy Birch	HIGH	66 grains/m³
🌳 Black Poplar	HIGH	61 grains/m³
🌳 Box Elder	HIGH	60 grains/m³
+35 more tracked Paper Birch Field Elm English Oak White Oak Holm Oak 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	127 grains/m³
🌳 Ash	V.HI	110 grains/m³
🌳 Downy Birch	HIGH	82 grains/m³
🌳 Black Poplar	HIGH	76 grains/m³
🌳 Box Elder	HIGH	75 grains/m³
+35 more tracked Field Elm Paper Birch English Oak White Oak Holm Oak 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	106 grains/m³
🌳 Ash	HIGH	92 grains/m³
🌳 Downy Birch	HIGH	69 grains/m³
🌳 Black Poplar	HIGH	64 grains/m³
🌳 Box Elder	HIGH	63 grains/m³
+35 more tracked Field Elm Paper Birch English Oak White Oak Holm Oak 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	HIGH	82 grains/m³
🌳 Ash	HIGH	71 grains/m³
🌳 Downy Birch	HIGH	53 grains/m³
🌳 Black Poplar	MED	49 grains/m³
🌳 Box Elder	MED	48 grains/m³
+35 more tracked Field Elm Paper Birch English Oak White Oak Holm Oak 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 Mountain Cedar Perennial Ryegrass White Mulberry Olive Pellitory-of-the-wall Upright Pellitory Parthenium Weed Timothy Grass Ribwort Plantain London Plane Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS

Last updated: 14:02 UTC

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

Map of Halifax (53.759305°, -1.866913°)

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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