The best times to visit Downtown Ottawa for ideal weather are

May 14th to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Downtown Ottawa Travel Info

Weather in Downtown Ottawa

Temperature

Average temperatures in Downtown Ottawa vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 28th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Downtown Ottawa, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 82.2°F (27.9°C) with temperatures rarely dropping below 60.4°F (15.8°C) at night.

Downtown Ottawa Temperatures (Fahrenheit)

Key
High
Average
Low

Downtown Ottawa Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Downtown Ottawa Perceived Temperature (F)

Key
High
Average
Low

Downtown Ottawa Perceived Temperature (C)

Key
High
Average
Low

 

Average Downtown Ottawa Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 24.4 15.1 6.5
Feb 26.3 16.8 8.3
Mar 38.7 28.5 19.2
Apr 55.7 44 34.3
May 70 58.1 46.4
Jun 76.8 65.6 55.7
Jul 81.1 70 59.5
Aug 79.2 67.8 56.8
Sep 72.4 60.4 50.1
Oct 58.4 48.2 39.6
Nov 45.4 36.1 28.2
Dec 30.8 23.1 15.6

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -4.2 -9.4 -14.2
Feb -3.2 -8.4 -13.2
Mar 3.7 -1.9 -7.1
Apr 13.2 6.7 1.3
May 21.1 14.5 8
Jun 24.9 18.7 13.2
Jul 27.3 21.1 15.3
Aug 26.2 19.9 13.8
Sep 22.4 15.8 10.1
Oct 14.7 9 4.2
Nov 7.4 2.3 -2.1
Dec -0.7 -4.9 -9.1

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Downtown Ottawa are November, March, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late August to early September. For example, on the week of August 27th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late May to early June with an average of 2 days of significant precipitation the week of May 28th.

When can you find snow in Downtown Ottawa? Weather stations report very large amounts of snow likely to be deepest around February, especially close to early March. The best time to ski (if at all) in Downtown Ottawa is often around around May 21st when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Downtown Ottawa.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Downtown Ottawa (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 19% 7.7 2
Feb 19% 11 1.8
Mar 18% 10.8 2.2
Apr 28% 4 3.7
May 21% 1.9 2.6
Jun 30% 4.8 3.5
Jul 23% 0 3.5
Aug 21% 0 3.7
Sep 22% 0 2.8
Oct 25% 1.8 3.1
Nov 15% 1.3 1.5
Dec 26% 5.3 3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 19 19.6 5.1
Feb 19 27.9 4.6
Mar 18 27.4 5.6
Apr 28 10.2 9.4
May 21 4.8 6.6
Jun 30 12.2 8.9
Jul 23 0 8.9
Aug 21 0 9.4
Sep 22 0 7.1
Oct 25 4.6 7.9
Nov 15 3.3 3.8
Dec 26 13.5 7.6

 

Humidity and Wind

Downtown Ottawa has some very humid months, with other comfortably humid months. The least humid month is April (52.6% relative humidity), and the most humid month is December (75.1%).

Wind in Downtown Ottawa is usually calm. The windiest month is April, followed by March and February. April’s average wind speed of around 7.4 knots (8.6 MPH or 13.8 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid April where average top sustained speeds reach 12.7 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Downtown Ottawa.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 6.2 Light breeze 10.5 Gentle breeze
Feb 6.6 Light breeze 11 Significant breeze
Mar 6.9 Light breeze 11.4 Gentle breeze
Apr 7.4 Gentle breeze 12.2 Significant breeze
May 6.3 Light breeze 10.7 Gentle breeze
Jun 5.2 Light breeze 9.3 Gentle breeze
Jul 4.8 Light breeze 8.8 Gentle breeze
Aug 4.8 Light breeze 8.6 Gentle breeze
Sep 4.9 Light breeze 8.5 Gentle breeze
Oct 5.7 Light breeze 10 Gentle breeze
Nov 6.1 Light breeze 10 Gentle breeze
Dec 6.4 Light breeze 10.6 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 69.7%
Feb 63.8%
Mar 55.9%
Apr 52.6%
May 52.9%
Jun 62.9%
Jul 62.6%
Aug 66.4%
Sep 68.7%
Oct 69.3%
Nov 67.7%
Dec 75.1%

 

Is it Safe to Travel to Downtown Ottawa?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Canada; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 07, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Downtown Ottawa, ON, Canada is August, followed by September and July. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Downtown Ottawa in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is very reliable. Displayed data is calculated relative to the peak, so a score of 49.3 in November means 49.3% of the tourists vs. August.

 

 

Overall Downtown Ottawa Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 74°F (23.3°C) and 29°F (-1.7°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 7 to 9 days of precipitation per month. June – August is the busiest season for tourism in Downtown Ottawa, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 77.3°F (25.2°C) and 37.4°F (3°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 8 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is far too cold this time of year in Downtown Ottawa to be enjoyable for warm weather travelers. The average high during this season is between 34°F (1.1°C) and 20°F (-6.7°C). On average, it rains or snows a fair amount: 5 to 8 times per month. These times of year are the slowest with tourists.

 

Best Times to TravelCanada › Downtown Ottawa, ON, Canada