Name: Pollen forecast for Chester (2026-10-17)
Creator: Pollen Count
Published: 2026-10-17T14:18:15Z
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 moderate, driven mainly by Mugwort.

MED

14 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed MED

Afternoon

Grass MED

Tree LOW

Weed MED

Evening

Grass MED

Tree LOW

Weed HIGH

Species	Level	Count
🌿 Mugwort	MED	14 grains/m³
🌿 Western Ragweed	MED	8 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Timothy Grass	MED	5 grains/m³
+35 more tracked Grass (mixed) Stinging Nettle Pigweed Sagebrush Fat Hen Russian Thistle Giant Ragweed Ribwort Plantain Common Sorrel Box Elder Alder Common Ragweed 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
🌿 Mugwort	MED	12 grains/m³
🌿 Western Ragweed	MED	7 grains/m³
🌾 Cock's-foot	MED	7 grains/m³
🌾 Perennial Ryegrass	MED	7 grains/m³
🌾 Timothy Grass	MED	7 grains/m³
+35 more tracked Grass (mixed) Stinging Nettle Pigweed Sagebrush Fat Hen Ribwort Plantain Russian Thistle Giant Ragweed Common Sorrel Box Elder Alder Common Ragweed 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
🌿 Mugwort	MED	10 grains/m³
🌿 Western Ragweed	MED	6 grains/m³
🌾 Perennial Ryegrass	MED	5 grains/m³
🌾 Grass (mixed)	MED	5 grains/m³
🌾 Cock's-foot	LOW	4 grains/m³
+35 more tracked Timothy Grass Pigweed Sagebrush Fat Hen Ribwort Plantain Russian Thistle Stinging Nettle Giant Ragweed Common Sorrel Box Elder Alder Common Ragweed 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
🌿 Mugwort	LOW	3 grains/m³
🌿 Western Ragweed	LOW	2 grains/m³
🌿 Pigweed	LOW	1 grains/m³
🌿 Giant Ragweed	LOW	1 grains/m³
🌿 Sagebrush	LOW	1 grains/m³
+35 more tracked Fat Hen Cock's-foot Perennial Ryegrass Timothy Grass Ribwort Plantain Grass (mixed) Common Sorrel Russian Thistle Stinging Nettle Box Elder Alder Common Ragweed 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: 14:18 UTC

4-Day Forecast	Tree	Grass	Weed
Sat 17 Oct	LOW	MED	MED
Sun 18 Oct	LOW	MED	MED
Mon 19 Oct	LOW	MED	MED
Tue 20 Oct	LOW	LOW	LOW

Map of Chester (53.20114°, -2.880899°)

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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