HIGH

14 active species

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed LOW

Afternoon

Grass MED

Tree LOW

Weed HIGH

Evening

Grass MED

Tree LOW

Weed V.HI

Species	Level	Count
🌿 Mugwort	HIGH	16 grains/m³
🌾 Grass (mixed)	MED	11 grains/m³
🌾 Cock's-foot	MED	8 grains/m³
🌾 Perennial Ryegrass	MED	8 grains/m³
🌾 Bermuda Grass	MED	7 grains/m³
+35 more tracked Timothy Grass Pellitory-of-the-wall Upright Pellitory Russian Thistle Pigweed Fat Hen Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress 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
🌿 Mugwort	HIGH	20 grains/m³
🌾 Grass (mixed)	MED	13 grains/m³
🌾 Cock's-foot	MED	10 grains/m³
🌾 Perennial Ryegrass	MED	9 grains/m³
🌾 Bermuda Grass	MED	8 grains/m³
+35 more tracked Timothy Grass Pellitory-of-the-wall Upright Pellitory Russian Thistle Fat Hen Pigweed Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress 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
🌿 Mugwort	HIGH	18 grains/m³
🌾 Grass (mixed)	MED	10 grains/m³
🌾 Cock's-foot	MED	8 grains/m³
🌾 Perennial Ryegrass	MED	8 grains/m³
🌾 Bermuda Grass	MED	6 grains/m³
+35 more tracked Pellitory-of-the-wall Timothy Grass Russian Thistle Upright Pellitory Pigweed Fat Hen Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress 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
🌿 Mugwort	V.HI	36 grains/m³
🌾 Grass (mixed)	MED	16 grains/m³
🌾 Cock's-foot	MED	12 grains/m³
🌾 Perennial Ryegrass	MED	12 grains/m³
🌿 Pellitory-of-the-wall	MED	11 grains/m³
+35 more tracked Russian Thistle Bermuda Grass Upright Pellitory Timothy Grass Pigweed Fat Hen Ribwort Plantain Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Hazel Japanese Cedar Mediterranean Cypress 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: 14:03 UTC

4-Day Forecast	Tree	Grass	Weed
Wed 20 May	LOW	MED	HIGH
Thu 21 May	LOW	MED	HIGH
Fri 22 May	LOW	MED	HIGH
Sat 23 May	LOW	MED	V.HI

Map of St. Louis (38.627°, -90.1994°)

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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