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About Pollen in Stevenage

Stevenage experiences peak spring allergen load (March-May) from Birch and Oak pollen, originating from extensive urban parkland (e.g., Fairlands Valley Park) and tree-lined residential avenues; summer (May-July) is dominated by Grass pollen, prevalent across local meadows, playing fields, and riverbank areas.

The town’s green belt proximity and sheltered urban design can concentrate airborne pollen levels; late-season (September-November) sees elevated Mould spore counts, primarily from decaying autumn foliage in damp, shaded environments.

HIGH

11 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
🌳 Silver Birch	HIGH	85 grains/m³
🌳 Downy Birch	HIGH	59 grains/m³
🌳 Paper Birch	MED	46 grains/m³
🌳 English Oak	MED	35 grains/m³
🌳 Ash	MED	34 grains/m³
+35 more tracked Black Poplar Box Elder Field Elm Holm Oak White Oak London Plane 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 Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	158 grains/m³
🌳 Downy Birch	V.HI	110 grains/m³
🌳 Paper Birch	HIGH	85 grains/m³
🌳 English Oak	HIGH	65 grains/m³
🌳 Ash	HIGH	64 grains/m³
+35 more tracked Black Poplar Box Elder Field Elm Holm Oak White Oak London Plane 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 Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	114 grains/m³
🌳 Downy Birch	HIGH	79 grains/m³
🌳 Paper Birch	HIGH	61 grains/m³
🌳 English Oak	MED	47 grains/m³
🌳 Ash	MED	46 grains/m³
+35 more tracked Black Poplar Box Elder Field Elm Holm Oak White Oak London Plane 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 Grass (mixed) Mesquite Common Sorrel Russian Thistle Stinging Nettle All species in the app: Android iOS
🌳 Silver Birch	V.HI	100 grains/m³
🌳 Downy Birch	HIGH	69 grains/m³
🌳 Paper Birch	HIGH	54 grains/m³
🌳 Ash	MED	41 grains/m³
🌳 English Oak	MED	41 grains/m³
+35 more tracked Black Poplar Box Elder Field Elm Holm Oak White Oak London Plane 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 Grass (mixed) Mesquite 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	V.HI	LOW	LOW
Fri 22 May	V.HI	LOW	LOW
Sat 23 May	V.HI	LOW	LOW

Map of Stevenage (51.900196°, -0.155543°)

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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