Name: Pollen forecast for Rennes (2026-09-07)
Creator: Pollen Count
Published: 2026-09-07T16:34:09Z
License: https://pollencount.org/terms/

The pollen count in Rennes today is X.HI, driven mainly by Giant Ragweed.

X.HI

17 active species

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4-Day Forecast:

Morning

Grass MED

Tree LOW

Weed HIGH

Afternoon

Grass MED

Tree LOW

Weed X.HI

Evening

Grass LOW

Tree LOW

Weed V.HI

Species	Level	Count
🌿 Giant Ragweed	X.HI	60 grains/m³
🌿 Common Ragweed	V.HI	47 grains/m³
🌿 Mugwort	HIGH	27 grains/m³
🌿 Western Ragweed	HIGH	24 grains/m³
🌿 Pellitory-of-the-wall	MED	12 grains/m³
+35 more tracked Perennial Ryegrass Upright Pellitory Grass (mixed) Cock's-foot Timothy Grass Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Sagebrush 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 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	29 grains/m³
🌿 Common Ragweed	HIGH	22 grains/m³
🌿 Mugwort	MED	13 grains/m³
🌿 Western Ragweed	MED	12 grains/m³
🌾 Perennial Ryegrass	MED	7 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Cock's-foot Pellitory-of-the-wall Upright Pellitory Russian Thistle Stinging Nettle Pigweed Fat Hen Ribwort Plantain Common Sorrel Sagebrush 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 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	47 grains/m³
🌿 Common Ragweed	V.HI	36 grains/m³
🌿 Mugwort	HIGH	21 grains/m³
🌿 Western Ragweed	HIGH	19 grains/m³
🌾 Perennial Ryegrass	MED	10 grains/m³
+35 more tracked Timothy Grass Grass (mixed) Cock's-foot Pellitory-of-the-wall Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Sagebrush 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 Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Giant Ragweed	X.HI	60 grains/m³
🌿 Common Ragweed	V.HI	47 grains/m³
🌿 Mugwort	HIGH	27 grains/m³
🌿 Western Ragweed	HIGH	25 grains/m³
🌿 Pellitory-of-the-wall	MED	12 grains/m³
+35 more tracked Upright Pellitory Russian Thistle Stinging Nettle Fat Hen Cock's-foot Perennial Ryegrass Timothy Grass Grass (mixed) Pigweed Ribwort Plantain Common Sorrel Sagebrush 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 Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS

Last updated: 16:34 UTC

4-Day Forecast	Tree	Grass	Weed
Mon 7 Sep	LOW	MED	X.HI
Tue 8 Sep	LOW	MED	HIGH
Wed 9 Sep	LOW	MED	V.HI
Thu 10 Sep	LOW	MED	X.HI

Map of Rennes (48.1173°, -1.6778°)

More in France

Bordeaux Grenoble Lille Lyon Marseille Montpellier

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