Name: Pollen forecast for Grenoble (2026-09-04)
Creator: Pollen Count
Published: 2026-09-04T15:02:08Z
License: https://pollencount.org/terms/

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

X.HI

16 active species

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4-Day Forecast:

Morning

Grass HIGH

Tree LOW

Weed V.HI

Afternoon

Grass HIGH

Tree LOW

Weed X.HI

Evening

Grass MED

Tree LOW

Weed X.HI

Species	Level	Count
🌿 Giant Ragweed	X.HI	393 grains/m³
🌿 Common Ragweed	X.HI	305 grains/m³
🌿 Mugwort	X.HI	274 grains/m³
🌿 Western Ragweed	X.HI	154 grains/m³
🌿 Pellitory-of-the-wall	X.HI	75 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Grass (mixed) Perennial Ryegrass Timothy Grass Cock's-foot Box Elder Alder Sagebrush 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	411 grains/m³
🌿 Common Ragweed	X.HI	319 grains/m³
🌿 Mugwort	X.HI	286 grains/m³
🌿 Western Ragweed	X.HI	161 grains/m³
🌿 Pellitory-of-the-wall	X.HI	78 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Grass (mixed) Perennial Ryegrass Timothy Grass Cock's-foot Box Elder Alder Sagebrush 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	428 grains/m³
🌿 Common Ragweed	X.HI	332 grains/m³
🌿 Mugwort	X.HI	298 grains/m³
🌿 Western Ragweed	X.HI	168 grains/m³
🌿 Pellitory-of-the-wall	X.HI	81 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Grass (mixed) Perennial Ryegrass Timothy Grass Cock's-foot Box Elder Alder Sagebrush 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	417 grains/m³
🌿 Common Ragweed	X.HI	324 grains/m³
🌿 Mugwort	X.HI	290 grains/m³
🌿 Western Ragweed	X.HI	164 grains/m³
🌿 Pellitory-of-the-wall	X.HI	79 grains/m³
+35 more tracked Upright Pellitory Stinging Nettle Fat Hen Russian Thistle Pigweed Ribwort Plantain Common Sorrel Grass (mixed) Perennial Ryegrass Timothy Grass Cock's-foot Box Elder Alder Sagebrush 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: 15:02 UTC

4-Day Forecast	Tree	Grass	Weed
Fri 4 Sep	LOW	HIGH	X.HI
Sat 5 Sep	LOW	HIGH	X.HI
Sun 6 Sep	LOW	HIGH	X.HI
Mon 7 Sep	LOW	HIGH	X.HI

Map of Grenoble (45.1885°, 5.7245°)

More in France

Bordeaux Lille Lyon Marseille Montpellier Nantes

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