Name: Pollen forecast for Chelmsford (2026-09-01)
Creator: Pollen Count
Published: 2026-09-01T15:30:26Z
License: https://pollencount.org/terms/

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About Pollen in Chelmsford

Chelmsford’s spring allergy profile, late March to May, features peak Birch and Oak pollen, largely sourced from Central Park and Admirals Park arboreal zones; summer, June to August, sees high grass pollen from River Chelmer and River Can floodplains and surrounding meadows. The city’s basin topography, particularly near Hylands Park, can create pollen trapping effects, intensifying localised allergen exposure; late autumn, September through November, experiences elevated mould spore levels, primarily from damp leaf decomposition in urban woodlands and riparian zones.

The pollen count in Chelmsford today is HIGH, driven mainly by Mugwort.

HIGH

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 HIGH

Evening

Grass MED

Tree LOW

Weed X.HI

Species	Level	Count
🌿 Mugwort	HIGH	24 grains/m³
🌿 Giant Ragweed	HIGH	19 grains/m³
🌿 Common Ragweed	HIGH	16 grains/m³
🌿 Sagebrush	HIGH	16 grains/m³
🌾 Perennial Ryegrass	MED	11 grains/m³
+35 more tracked Grass (mixed) Cock's-foot Timothy Grass Russian Thistle Stinging Nettle Pigweed Fat Hen Western Ragweed 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
🌿 Mugwort	V.HI	34 grains/m³
🌿 Giant Ragweed	HIGH	27 grains/m³
🌿 Common Ragweed	HIGH	23 grains/m³
🌿 Sagebrush	HIGH	23 grains/m³
🌾 Grass (mixed)	MED	16 grains/m³
+35 more tracked Perennial Ryegrass Cock's-foot Timothy Grass Stinging Nettle Russian Thistle Pigweed Fat Hen Western Ragweed 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
🌿 Mugwort	V.HI	30 grains/m³
🌿 Giant Ragweed	HIGH	23 grains/m³
🌿 Common Ragweed	HIGH	20 grains/m³
🌿 Sagebrush	HIGH	20 grains/m³
🌾 Grass (mixed)	MED	8 grains/m³
+35 more tracked Stinging Nettle Cock's-foot Perennial Ryegrass Timothy Grass Russian Thistle Pigweed Fat Hen Ribwort Plantain Western Ragweed 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
🌿 Mugwort	HIGH	29 grains/m³
🌿 Giant Ragweed	HIGH	23 grains/m³
🌿 Sagebrush	HIGH	20 grains/m³
🌿 Common Ragweed	HIGH	19 grains/m³
🌿 Russian Thistle	MED	7 grains/m³
+35 more tracked Stinging Nettle Pigweed Fat Hen Western Ragweed Perennial Ryegrass Timothy Grass Ribwort Plantain Grass (mixed) Cock's-foot 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: 15:30 UTC

4-Day Forecast	Tree	Grass	Weed
Tue 1 Sep	LOW	MED	HIGH
Wed 2 Sep	LOW	MED	V.HI
Thu 3 Sep	LOW	MED	V.HI
Fri 4 Sep	LOW	MED	HIGH

Map of Chelmsford (51.719099°, 0.480658°)

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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