Name: Pollen forecast for Chester (2026-09-15)
Creator: Pollen Count
Published: 2026-09-15T15:37:17Z
License: https://pollencount.org/terms/

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About Pollen in Chester

Chester experiences peak tree pollen March-May; Birch and Oak are dominant, sourced from Grosvenor Park and the city’s mature urban canopy. Grass pollen then prevails May-July, originating from extensive Chester Meadows and River Dee banks. The city’s walled geography can locally concentrate airborne allergens; rural Cheshire contributes additional pollen drift. Late-season mould spores escalate August-October, exacerbated by damp River Dee environments and decaying leaf litter.

The pollen count in Chester today is V.HI, driven mainly by Giant Ragweed.

V.HI

15 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed HIGH

Afternoon

Grass MED

Tree LOW

Weed V.HI

Evening

Grass LOW

Tree LOW

Weed MED

Species	Level	Count
🌿 Giant Ragweed	V.HI	33 grains/m³
🌿 Common Ragweed	HIGH	25 grains/m³
🌿 Mugwort	HIGH	21 grains/m³
🌿 Western Ragweed	MED	14 grains/m³
🌾 Grass (mixed)	MED	10 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Timothy Grass Sagebrush Russian Thistle Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Box Elder Alder 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
🌿 Giant Ragweed	V.HI	33 grains/m³
🌿 Common Ragweed	HIGH	25 grains/m³
🌿 Mugwort	HIGH	20 grains/m³
🌿 Western Ragweed	MED	14 grains/m³
🌾 Grass (mixed)	MED	9 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Timothy Grass Sagebrush Russian Thistle Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Box Elder Alder 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
🌿 Giant Ragweed	HIGH	25 grains/m³
🌿 Common Ragweed	HIGH	19 grains/m³
🌿 Mugwort	HIGH	15 grains/m³
🌿 Western Ragweed	MED	11 grains/m³
🌾 Grass (mixed)	MED	7 grains/m³
+35 more tracked Cock's-foot Perennial Ryegrass Timothy Grass Sagebrush Russian Thistle Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Box Elder Alder 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
🌿 Giant Ragweed	V.HI	34 grains/m³
🌿 Common Ragweed	HIGH	26 grains/m³
🌿 Mugwort	HIGH	21 grains/m³
🌿 Western Ragweed	HIGH	15 grains/m³
🌾 Grass (mixed)	MED	11 grains/m³
+35 more tracked Perennial Ryegrass Cock's-foot Timothy Grass Sagebrush Russian Thistle Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Box Elder Alder 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: 15:37 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 15 Sep	LOW	MED	V.HI
Wed 16 Sep	LOW	MED	V.HI
Thu 17 Sep	LOW	MED	HIGH
Fri 18 Sep	LOW	MED	V.HI

Map of Chester (53.20114°, -2.880899°)

More in United Kingdom

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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