Name: Pollen forecast for Ottawa (2026-10-16)
Creator: Pollen Count
Published: 2026-10-16T15:26:24Z
License: https://pollencount.org/terms/

The pollen count in Ottawa today is low, driven mainly by Mugwort.

LOW

12 active species

Refreshing live forecast…

.forecast-refresh-status{display:none!important}.date-tab{cursor:default;opacity:.55}Showing today's cached forecast. Enable JavaScript to switch days and load live data.

4-Day Forecast:

Morning

Grass LOW

Tree LOW

Weed LOW

Afternoon

Grass LOW

Tree LOW

Weed LOW

Evening

Grass LOW

Tree LOW

Weed LOW

Species	Level	Count
🌿 Mugwort	LOW	2 grains/m³
🌿 Pigweed	LOW	1 grains/m³
🌿 Fat Hen	LOW	1 grains/m³
🌾 Cock's-foot	LOW	1 grains/m³
🌾 Perennial Ryegrass	LOW	1 grains/m³
+35 more tracked Upright Pellitory Timothy Grass Ribwort Plantain Grass (mixed) Common Sorrel Russian Thistle Stinging Nettle 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 Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Parthenium Weed London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Field Elm All species in the app: Android iOS
🌿 Mugwort	LOW	1 grains/m³
🌾 Cock's-foot	LOW	1 grains/m³
🌾 Perennial Ryegrass	LOW	1 grains/m³
🌿 Upright Pellitory	LOW	1 grains/m³
🌾 Timothy Grass	LOW	1 grains/m³
+35 more tracked Grass (mixed) Stinging Nettle Box Elder Alder Pigweed Common Ragweed Western Ragweed Giant Ragweed Sagebrush Paper Birch Silver Birch Downy Birch Australian Pine Japanese Cypress Fat Hen Hazel Japanese Cedar Mediterranean Cypress Bermuda Grass Ash Mountain Cedar White Mulberry Olive Pellitory-of-the-wall Parthenium Weed Ribwort Plantain London Plane Black Poplar Mesquite White Oak Holm Oak English Oak Common Sorrel Russian Thistle Field Elm All species in the app: Android iOS
🌿 Mugwort	MED	9 grains/m³
🌾 Cock's-foot	MED	6 grains/m³
🌾 Timothy Grass	MED	6 grains/m³
🌾 Grass (mixed)	MED	6 grains/m³
🌿 Stinging Nettle	MED	5 grains/m³
+35 more tracked Pigweed Fat Hen Perennial Ryegrass Upright Pellitory Russian Thistle Ribwort Plantain Common Sorrel Pellitory-of-the-wall 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 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
🌿 Mugwort	V.HI	44 grains/m³
🌿 Stinging Nettle	HIGH	23 grains/m³
🌿 Upright Pellitory	HIGH	21 grains/m³
🌾 Timothy Grass	HIGH	21 grains/m³
🌾 Grass (mixed)	HIGH	21 grains/m³
+35 more tracked Cock's-foot Russian Thistle Pigweed Fat Hen Ribwort Plantain Perennial Ryegrass Common Sorrel Pellitory-of-the-wall 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 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: 15:26 UTC

4-Day Forecast	Tree	Grass	Weed
Fri 16 Oct	LOW	LOW	LOW
Sat 17 Oct	LOW	LOW	LOW
Sun 18 Oct	LOW	MED	MED
Mon 19 Oct	LOW	HIGH	V.HI

Map of Ottawa (45.4215°, -75.6972°)

More in Canada

Montreal Toronto Quebec City Halifax Winnipeg Calgary

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