The best times to visit Ontario for ideal weather are

May 28th to September 9th

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

 

 


Other Ontario Travel Info

Weather in Ontario

Temperature

Average temperatures in Ontario vary an incredible amount. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 52nd 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 Ontario, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 78.3°F (25.7°C) with temperatures rarely dropping below 59.6°F (15.3°C) at night.

Ontario Temperatures (Fahrenheit)

Key
High
Average
Low

Ontario 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.

Ontario Perceived Temperature (F)

Key
High
Average
Low

Ontario Perceived Temperature (C)

Key
High
Average
Low

 

Average Ontario 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 19.9 11.6 4
Feb 21.3 12.2 4
Mar 36.8 26.8 18.6
Apr 51.8 40.6 31.4
May 64.4 52.7 42.9
Jun 72.4 61.9 53
Jul 76.6 66.4 57.3
Aug 75.4 65.1 56.5
Sep 67.7 57.6 49.3
Oct 53.4 45.3 38.7
Nov 39.5 32.4 26.3
Dec 22 15.3 9.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -6.7 -11.3 -15.6
Feb -5.9 -11 -15.6
Mar 2.7 -2.9 -7.4
Apr 11 4.8 -0.3
May 18 11.5 6.1
Jun 22.4 16.6 11.7
Jul 24.8 19.1 14.1
Aug 24.1 18.4 13.6
Sep 19.8 14.2 9.6
Oct 11.9 7.4 3.7
Nov 4.2 0.2 -3.2
Dec -5.6 -9.3 -12.7

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ontario are February, 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 early to mid February. For example, on the week of February 12th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late October with an average of 1 days of significant precipitation the week of October 22nd.

When can you find snow in Ontario? Weather stations report no annual snow. 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 Ontario.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Ontario (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 8% 0 0.9
Feb 7% 0 0.8
Mar 8% 0 0.8
Apr 10% 0 1.2
May 9% 0 1.2
Jun 11% 0 1.7
Jul 9% 0 1.6
Aug 9% 0 1.6
Sep 9% 0 1.4
Oct 12% 0 1.3
Nov 11% 0 1.2
Dec 13% 0 1.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 8 0 2.3
Feb 7 0 2
Mar 8 0 2
Apr 10 0 3
May 9 0 3
Jun 11 0 4.3
Jul 9 0 4.1
Aug 9 0 4.1
Sep 9 0 3.6
Oct 12 0 3.3
Nov 11 0 3
Dec 13 0 3.3

 

Humidity and Wind

Ontario has some very humid months, with other moderately humid months on the other side of the year. The least humid month is April (46.8% relative humidity), and the most humid month is November (75.9%).

Wind in Ontario is usually moderate. The windiest month is May, followed by April and September. May’s average wind speed of around 8.1 knots (9.3 MPH or 15 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 early to mid July where average top sustained speeds reach 16.7 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 6.5 Light breeze 11.4 Significant breeze
Feb 6.3 Light breeze 11.7 Significant breeze
Mar 7.5 Gentle breeze 13.6 Significant breeze
Apr 7.8 Gentle breeze 14 Significant breeze
May 8.1 Gentle breeze 15 Significant breeze
Jun 7.2 Gentle breeze 14.8 Significant breeze
Jul 7.1 Gentle breeze 14.4 Significant breeze
Aug 7.1 Gentle breeze 14.2 Significant breeze
Sep 7.5 Gentle breeze 13.6 Significant breeze
Oct 7.4 Gentle breeze 13.4 Significant breeze
Nov 7.4 Gentle breeze 13.1 Significant breeze
Dec 6.1 Light breeze 10.8 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 67.4%
Feb 59.9%
Mar 58.3%
Apr 46.8%
May 54.1%
Jun 63%
Jul 64.9%
Aug 68.1%
Sep 72%
Oct 72.4%
Nov 75.9%
Dec 73.8%

 

Is it Safe to Travel to Ontario?

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 Ontario, Canada is July, followed by August and June. 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 Ontario in December. 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 slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 33.7 in December means 33.7% of the tourists vs. July.

 

 

Overall Ontario Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 69.9°F (21.1°C) and 25.8°F (-3.4°C) with far warmer temperatures in the later months. Rain is rare with 2 to 3 days of significant precipitation per month. Spring is the slowest for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with about 3 days of precipitation per month. June – August is the busiest season for tourism in Ontario, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 70.5°F (21.4°C) and 29.8°F (-1.2°C), which will feel chilly given the humidity and wind. It rains or snows a normal amount: 3 to 4 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Winter (December through February)

Weather is far too cold this time of year in Ontario to be enjoyable for warm weather travelers. The average high during this season is between 25.8°F (-3.4°C) and 17.4°F (-8.1°C). On average, it rains or snows a smalll amount: 2 to 4 times per month. These times of year are fairly slow with tourists.

 

Best Times to TravelCanada › Ontario, Canada