Name: Pollen forecast for St. Louis (2026-10-22)
Creator: Pollen Count
Published: 2026-10-22T15:56:47Z
License: https://pollencount.org/terms/

The pollen count in St. Louis today is high, driven mainly by Grass (mixed).

HIGH

14 active species

Refreshing live forecast…

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4-Day Forecast:

Morning

Grass HIGH

Tree LOW

Weed HIGH

Afternoon

Grass HIGH

Tree LOW

Weed HIGH

Evening

Grass HIGH

Tree LOW

Weed X.HI

Species	Level	Count
🌾 Grass (mixed)	HIGH	23 grains/m³
🌿 Mugwort	HIGH	21 grains/m³
🌾 Cock's-foot	HIGH	20 grains/m³
🌾 Perennial Ryegrass	MED	19 grains/m³
🌾 Bermuda Grass	MED	16 grains/m³
+35 more tracked Pellitory-of-the-wall Timothy Grass 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
🌾 Grass (mixed)	HIGH	26 grains/m³
🌾 Cock's-foot	HIGH	24 grains/m³
🌿 Mugwort	HIGH	23 grains/m³
🌾 Perennial Ryegrass	HIGH	23 grains/m³
🌾 Bermuda Grass	MED	19 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	29 grains/m³
🌾 Grass (mixed)	HIGH	29 grains/m³
🌾 Cock's-foot	HIGH	26 grains/m³
🌾 Perennial Ryegrass	HIGH	25 grains/m³
🌿 Pellitory-of-the-wall	HIGH	21 grains/m³
+35 more tracked Bermuda Grass Upright Pellitory Timothy Grass 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
🌾 Grass (mixed)	HIGH	33 grains/m³
🌾 Cock's-foot	HIGH	30 grains/m³
🌾 Perennial Ryegrass	HIGH	28 grains/m³
🌿 Mugwort	HIGH	25 grains/m³
🌾 Bermuda Grass	HIGH	23 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

Last updated: 15:56 UTC

4-Day Forecast	Tree	Grass	Weed
Thu 22 Oct	LOW	HIGH	HIGH
Fri 23 Oct	LOW	HIGH	HIGH
Sat 24 Oct	LOW	HIGH	HIGH
Sun 25 Oct	LOW	HIGH	HIGH

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