Flowers Flowers

Click here to sign up for alerts

Tap here to sign up for alerts

info icon

The pollen forecast for your area

The weather forecast for your area

Discover our hay fever advice and more information about pollen in your area.

Pollen Count in Ottawa, Ontario

What is the pollen count in Ottawa today?

Want to know how many tissues to stuff in your pocket today? Your Pollen Pal can help with that. Search by postal code above for a detailed daily breakdown of the pollen count in Ottawa.

Pollen forecast for Ottawa

Track the Ottawa pollen count for the next few days using the tracker. Your Pollen Pal gives you a pollen forecast in any location across the city so you can head out to Rideau Canal or Parliament Hill safe in the knowledge that you are lowering your chances of having hay fever symptoms.

Pollen Month-by-Month in Ottawa

Pollen Count by Month Ottawa

  1. January

  2. With snow covering most of Ottawa, this month has a low pollen count. Most Allergies in January are most likely mold or animal related. If you’re having a hard time distinguishing between a winter cold and hay fever check out our guide for a breakdown.

  3. February

  4. So long as the freezing temperatures continue in Ottawa, pollen rarely makes its presence felt this early in the year.

  5. March

  6. March welcomes spring and the start of tree pollen season. Trees blooming include Maples, Willows, Poplars, Oaks, Cedars, Hazels, Alders, Elms and Pines.

  7. April

  8. Kentucky grass is the first representative of grass pollen season caused by April’s spring showers. Tree pollen remains the dominant pollen producer in Ottawa during April.

  9. May

  10. Within May, Sycamore trees begin pollenating, along with Kentucky, Bermuda, Johnson, Orchard, and Timothy grasses, which spread pollen throughout the city.

  11. June

  12. By June, pines, birch and oaks are the main pollen producers, while sweet vernal begins to add its pollen to the other grasses.

  13. July

  14. In July, grass pollen is peaking in Ottawa while the majority of tree pollen production is coming to an end for another year.

  15. August

  16. The good news is that tree pollen production has peaked with the exception of a few late bloomers. For Ottawa, ragweed is now the dominant pollen producer, along with dock, nettle, mugwort and plantain.

  17. September

  18. Feel free to take a deep breath without a runny noses or itchy eyes as hay fever season is finally winding down with Ragweed on the decline. Let’s hope that the sun sticks around to make the most of it!

  19. October

  20. With any luck, the last of the weed pollen is on its way out, although some ragweed along with crab grass may hang around until the first frost of winter in Ottawa.

  21. November

  22. Enjoy the changing leaf colours without your eyes watering: November’s pollen count tends to be low, along with the temperature.

  23. December

  24. December brings the first official day of winter in Ottawa, which means traditionally low levels of pollen for the next few months.

Top Causes of Pollen in Ottawa

Trees produce pollen in Ottawa from March until July. Ottawa’s most common tree allergens are Alder, Ash, Birch, and Poplar trees1. Grass pollen is in the air from April until July as well, followed by weed pollen. Ragweed pollen is the dominant strain in Ottawa, beginning in August through September (or until cooler temperatures take over.)

Pollen count by Pollen Category Ottawa

How to Stay Prepared for Ottawa’s Allergy Seasons

  • To comfort your snuffy nose have a package of Kleenex® Ultra On-the-Go 3-Ply Pocket Facial Tissues ready.
  • Wear sunglasses, when possible, to avoid pollen from reaching your eyes.
  • As often as possible, wash your hands while out to remove pollen.
  • Have petroleum jelly handy and apply around your nostrils and your upper lip to block pollen.2
  • Filter the air by wearing a highly protective comfortable mask to block pollen.3
  • Remove pollen by showering and changing your clothing once home.
  • When in doubt try nasal breathing exercises to assist when using standard nasal sprays.4

Pollen Hotspots in Ottawa

Canada’s capital city might be buried under snow for a good part of the year but when spring comes, life blooms again across Ottawa. Unfortunately, so does pollen. Events like the Spring Tulip Festival in May might be allergy inducing due to pollen peaks. Even the popular Rideau Canal may need to be avoided at high pollen times. Check the pollen forecast to plan your trip and keep reading to find alternative activities for those hay fever inducing days.

Allergy Friendly Activities in Ottawa

Just because its hay fever season doesn’t mean you need to hide away. There are plenty of activities in and around Ottawa that can be enjoyed, pollen or no pollen. If you do want to head out into green spaces, it’s worth noting when Ottawa’s low pollen seasons are.

Cultural Sites

Naturally, as the capital of Canada, Ottawa has a plethora of important buildings to visit and explore. Of course, during grass pollen season, you may have to stick to the indoor tours of Parliament Hill, as it is surrounded by fields of grass. Check Your Pollen Pal for the pollen forecast so you know before you go.

  • Parliament Hill
  • National Gallery of Canada
  • Ottawa Art Gallery
  • Rideau Canal
  • Haunted Walk of Ottawa
  • ByWard Market


Long cold winters mean that much of the shopping in Ottawa is indoors and therefore pollen free all year round!

  • Rideau Centre
  • Bayshore Shopping Centre
  • St. Laurent Shopping
  • Sparks Street Mall
  • CARP Famers’ Market


Brush up on your trivia by visiting any of Ottawa’s many museums.

  • Canadian Museum of History and the Children’s Museum
  • Canadian Aviation and Space Museum
  • Canada Science and Technology Museum
  • The Canadian War Museum
  • National Gallery of Canada



Pollen Levels

The following table shows the risk level for each type of pollen derived by applying NAB guidelines to our data and taking percentile values from the extended season for each type of pollen. 

Severity of pollen is dictated by the PPM number, which stands for Pollen Grains Per Cubic Metre. The weather and time of day can also be a big factor when it comes to how the pollen count can affect you. As pollen falls to the ground when the heat dissipates during the evening, this can mean your seasonal allergy symptoms get worse and is why many allergy sufferers have worse symptoms in the night. On rainy days, you’ll find your allergy symptoms are easier to manage as rain tends to wash pollen away.

  • Low
  • Moderate
  • High
  • Critical

Tree Pollen

Tree pollen Icon
  • 0-95
  • 96-207
  • 208-703
  • 704+

Weed Pollen

Weed Pollen Icon
  • 0-20
  • 21-77
  • 78-266
  • 267+

Grass Pollen

Grass pollen Icon
  • 0-29
  • 30-60
  • 61-341
  • 342+

Show Allergy Season Who’s Boss

Looking for more info on seasonal allergies and symptoms? Check out our latest articles to help you put pollen allergies in their place.

4.5 mins Read Pollen Allergies Image The Pollen Calendar Arrow
6 mins Read Pollen Allergies Image Types Of Pollen Arrow
5.5 mins Read Pollen Allergies Image Guide to Tree Pollen Allergies in Canada Arrow
5 mins Read Pollen Allergies Image Hay Fever Symptoms and Signs Arrow
6 mins Read Pollen Allergies Image Understanding Winter Allergies: Everything You Need To Know Arrow
6 mins Read Pollen Allergies Image How to Stop a Runny Nose Arrow

Find Comfort From Allergies with Kleenex®

Seasonal or not, allergy symptoms can take a heavy toll on you. Let Kleenex® facial tissues help relieve some of those symptoms.

View all products
Ultrasoft Upright Box
Kleenex® Ultra Soft™ Facial Tissues - Upright Box

Ultra absorbent for runny noses and water eyes.

Learn More
Soothing Lotion Upright Box
Kleenex® Soothing Lotion™ Facial Tissues - Upright Box

Made with daily moisturizers to help nourish skin

Learn More
Cooling Lotion
Kleenex® Cooling Lotion™ Facial Tissues

The only tissue that actively releases a cool sensation to soothe a nose on contact.

Learn More
Pollen Faq

Frequently Asked Questions

The pollen tracker pools data from various sources including but not limited to
  1. Local Pollen traps, where available.
  2. Weather data and other anthropogenic factors.
  3. Vegetation related data around your region.
“With such levels of accuracy, we can predict the pollen count on your street for up to five days ahead.” Madhusudhan Anand, Co-Founder & CTO of Ambee

Pollen is a light airborne dust that acts as a fertilizing agent for various plants. Trees, flowers, grass, and weeds all produce pollen, especially during the spring and summer months.

Similar to how the Air Quality Health Index measures pollution in the air, the pollen count is the measure of how much pollen is in the air on a given day. This information is gathered from reporting stations across the country to provide accurate local pollen readings.

It’s not uncommon to think you’ve caught a cold or flu when you actually have allergies. Sometimes referred as hay fever, tree pollen allergies may cause these symptomsnasal congestion; sinus pressure; runny nose; itchy, watery, red eyes; coughing; scratchy throat; postnasal drip; and fatigue1.

In a word, yes. A study presented at the 249th National Meeting & Exposition of the American Chemical Society (ACS) reported that a pair of air pollutants linked to climate change interact with certain pollens resulting in a change at a chemical level which increases the pollen’s potency. This in turn provokes a more powerful immune response from allergy sufferers.3

Pollen counts are highest on dry, windy days and lower after rainfall or at night – and usually peak between 5 a.m. and 10 a.m. and again at dusk, so avoid these times if you plan to be outdoors. If you plan to exercise outside during allergy season, consider wearing a face mask designed to filter out pollens. As soon as you get home, rinse out your nose with saline or ask your doctor about nose sprays to provide relief.

A tree pollen level above 50 is considered high, while one to 10 is considered low. Be sure to check your local pollen count before venturing outside and plan accordingly.