HIGH

15 active species

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4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed LOW

Afternoon

Grass HIGH

Tree LOW

Weed MED

Evening

Grass HIGH

Tree LOW

Weed V.HI

Species	Level	Count
🌾 Grass (mixed)	HIGH	20 grains/m³
🌾 Bermuda Grass	MED	14 grains/m³
🌾 Cock's-foot	MED	14 grains/m³
🌿 Mugwort	MED	9 grains/m³
🌾 Perennial Ryegrass	MED	9 grains/m³
+35 more tracked Timothy Grass Sagebrush 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 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)	MED	12 grains/m³
🌾 Bermuda Grass	MED	8 grains/m³
🌾 Cock's-foot	MED	8 grains/m³
🌿 Mugwort	MED	6 grains/m³
🌿 Pellitory-of-the-wall	MED	6 grains/m³
+35 more tracked Sagebrush Perennial Ryegrass Timothy Grass Pigweed Fat Hen Upright Pellitory Ribwort Plantain Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed 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)	MED	8 grains/m³
🌾 Bermuda Grass	MED	5 grains/m³
🌾 Cock's-foot	MED	5 grains/m³
🌿 Sagebrush	LOW	4 grains/m³
🌿 Mugwort	LOW	4 grains/m³
+35 more tracked Pellitory-of-the-wall Pigweed Fat Hen Perennial Ryegrass Upright Pellitory Timothy Grass Ribwort Plantain Russian Thistle Stinging Nettle Common Sorrel Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed 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)	LOW	4 grains/m³
🌾 Bermuda Grass	LOW	3 grains/m³
🌾 Cock's-foot	LOW	3 grains/m³
🌿 Pigweed	LOW	2 grains/m³
🌿 Sagebrush	LOW	2 grains/m³
+35 more tracked Mugwort Fat Hen Perennial Ryegrass Pellitory-of-the-wall Upright Pellitory Timothy Grass Ribwort Plantain Russian Thistle Common Sorrel Stinging Nettle Box Elder Alder Common Ragweed Western Ragweed Giant Ragweed 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	HIGH	MED
Thu 21 May	LOW	MED	MED
Fri 22 May	LOW	MED	LOW
Sat 23 May	LOW	LOW	LOW

Map of San Francisco (37.7749°, -122.4194°)

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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