The best times to visit Sudbury 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 Sudbury Travel Info

Weather in Sudbury


Average temperatures in Sudbury 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 21st 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 Sudbury, 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 79.1°F (26.2°C) with temperatures rarely dropping below 56.7°F (13.7°C) at night.

Sudbury Temperatures (Fahrenheit)


Sudbury Temperatures (Celsius)


“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.

Sudbury Perceived Temperature (F)


Sudbury Perceived Temperature (C)



Average Sudbury 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 20.3 10.6 2.2
Feb 21.9 11.5 2.8
Mar 35.4 24.2 14.4
Apr 50.3 38.5 28.8
May 66.8 53.5 41.9
Jun 74.5 62.1 51.6
Jul 78.3 66.2 55.5
Aug 75.9 64.4 54.3
Sep 68.5 56.5 47.1
Oct 53.6 43.9 36.3
Nov 39.8 31.7 24.7
Dec 26.3 18.3 11.2

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -6.5 -11.9 -16.6
Feb -5.6 -11.4 -16.2
Mar 1.9 -4.3 -9.8
Apr 10.2 3.6 -1.8
May 19.3 11.9 5.5
Jun 23.6 16.7 10.9
Jul 25.7 19 13.1
Aug 24.4 18 12.4
Sep 20.3 13.6 8.4
Oct 12 6.6 2.4
Nov 4.3 -0.2 -4.1
Dec -3.2 -7.6 -11.6



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sudbury are February, March, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early February. For example, on the week of February 5th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid October with an average of 3 days of significant precipitation the week of October 15th.

When can you find snow in Sudbury? Weather stations report very large amounts of snow likely to be deepest around February, especially close to late February and early March. The best time to ski (if at all) in Sudbury is often around around December 17th 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 Sudbury.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 22% 7.8 2.3
Feb 15% 9.4 1.4
Mar 17% 8.2 1.8
Apr 23% 3.7 3.4
May 24% 7.1 2.9
Jun 27% 0 3.4
Jul 24% 0 2.9
Aug 28% 0 4
Sep 21% 0 3
Oct 31% 1.9 4.2
Nov 27% 2.8 2.8
Dec 26% 6.7 3.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 22 19.8 5.8
Feb 15 23.9 3.6
Mar 17 20.8 4.6
Apr 23 9.4 8.6
May 24 18 7.4
Jun 27 0 8.6
Jul 24 0 7.4
Aug 28 0 10.2
Sep 21 0 7.6
Oct 31 4.8 10.7
Nov 27 7.1 7.1
Dec 26 17 8.4


Humidity and Wind

Sudbury has some very humid months, with other comfortably humid months. The least humid month is May (50.2% relative humidity), and the most humid month is December (76.5%).

Wind in Sudbury is usually moderate. The windiest month is April, followed by December and February. April’s average wind speed of around 9.3 knots (10.7 MPH or 17.3 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 16.6 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 8.5 Gentle breeze 14.7 Significant breeze
Feb 8.7 Gentle breeze 14.6 Significant breeze
Mar 8.6 Gentle breeze 14.9 Significant breeze
Apr 9.3 Gentle breeze 15.7 Significant breeze
May 8.6 Gentle breeze 15.1 Significant breeze
Jun 6.9 Light breeze 13 Significant breeze
Jul 6.6 Light breeze 12.9 Significant breeze
Aug 6.8 Light breeze 12.7 Significant breeze
Sep 7.3 Gentle breeze 13.1 Significant breeze
Oct 8.2 Gentle breeze 14.3 Significant breeze
Nov 8.5 Gentle breeze 14.4 Significant breeze
Dec 8.8 Gentle breeze 14.7 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 69.1%
Feb 61.8%
Mar 53.9%
Apr 52%
May 50.2%
Jun 60.3%
Jul 61.4%
Aug 67%
Sep 69.5%
Oct 71.3%
Nov 74.5%
Dec 76.5%


Is it Safe to Travel to Sudbury?

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 Sudbury, ON, 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 Sudbury 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

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 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 Sudbury Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 71.7°F (22.1°C) and 23.4°F (-4.8°C) with far warmer temperatures in the later months. Rain is somewhat common with 5 to 8 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 8 to 9 days of precipitation per month. June – August is the busiest season for tourism in Sudbury, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 72.7°F (22.6°C) and 31.8°F (-0.1°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 6 to 10 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 Sudbury to be enjoyable for warm weather travelers. The average high during this season is between 29.3°F (-1.5°C) and 16.9°F (-8.4°C). On average, it rains or snows a fair amount: 4 to 8 times per month. These times of year are fairly slow with tourists.


Best Times to TravelCanada › Sudbury, ON, Canada