Average Weather in Greater Sudbury Canada
In Greater Sudbury, the temperature typically varies from 2°F to 77°F over the course of the year, and is rarely below -18°F or above 85°F.
The warm season lasts for 3.8 months, from May 23 to September 16, with an average daily high temperature above 65°F. The hottest day of the year is July 19, with an average high of 77°F and low of 59°F.
The cold season lasts for 3.3 months, from December 2 to March 11, with an average daily high temperature below 31°F. The coldest day of the year is January 28, with an average low of 2°F and high of 19°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
The length of the day in Greater Sudbury varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 35 minutes of daylight; the longest day is June 21, with 15 hours, 49 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:30 AM on June 16, and the latest sunrise is 2 hours, 40 minutes later at 8:10 AM on November 4. The earliest sunset is at 4:36 PM on December 11, and the latest sunset is 4 hours, 44 minutes later at 9:20 PM on June 25.
Daylight saving time (DST) is observed in Greater Sudbury during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Greater Sudbury, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Greater Sudbury begins around May 24 and lasts for 4.8 months, ending around October 18. On August 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
The cloudier part of the year begins around October 18 and lasts for 7.2 months, ending around May 24. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 73% of the time, and clear, mostly clear, or partly cloudy 27% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Greater Sudbury varies throughout the year.
The wetter season lasts 8.0 months, from April 12 to December 12, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 32% on October 4.
The drier season lasts 4.0 months, from December 12 to April 12. The smallest chance of a wet day is 15% on February 13.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Greater Sudbury changes throughout the year.
Rain alone is the most common for 8.5 months, from March 16 to November 30. The highest chance of a day with rain alone is 32% on October 4.
Snow alone is the most common for 3.5 months, from November 30 to March 16. The highest chance of a day with snow alone is 14% on January 17.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day in the year. Greater Sudbury experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.7 months, from March 4 to December 25, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 23, with an average total accumulation of 2.9 inches.
The rainless period of the year lasts for 2.3 months, from December 25 to March 4. The least rain falls around February 6, with and average total accumulation of 0.2 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day in the year. Greater Sudbury experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.4 months, from October 20 to May 1, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 4, with an average total liquid-equivalent accumulation of 0.9 inches.
The snowless period of the year lasts for 5.6 months, from May 1 to October 20. The least snow falls around July 21, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The perceived humidity level in Greater Sudbury, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 4% of 4% throughout.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Greater Sudbury experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 4.6 months, from December 15 to May 3, with average wind speeds of more than 3.2 miles per hour. The windiest day of the year is February 27, with an average hourly wind speed of 3.9 miles per hour.
The calmer time of year lasts for 7.4 months, from May 3 to December 15. The calmest day of the year is July 28, with an average hourly wind speed of 2.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Greater Sudbury varies throughout the year.
The wind is most often from the south for 2.7 weeks, from June 7 to June 26 and for 3.5 months, from August 15 to November 29, with a peak percentage of 36% on September 16. The wind is most often from the west for 1.6 months, from June 26 to August 15, with a peak percentage of 37% on July 20. The wind is most often from the north for 6.3 months, from November 29 to June 7, with a peak percentage of 44% on March 8.
Greater Sudbury is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.5 months, from July 9 to September 25, with an average temperature above 60°F. The day of the year with the warmest water is August 13, with an average temperature of 67°F.
The time of year with cooler water lasts for 4.9 months, from December 11 to May 9, with an average temperature below 40°F. The day of the year with the coolest water is March 6, with an average temperature of 33°F.
Average Water Temperature
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences very significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.5 months, from May 5 to August 20, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is June 29, with an average of 6.7 kWh.
The darker period of the year lasts for 3.6 months, from October 25 to February 13, with an average daily incident shortwave energy per square meter below 2.2 kWh. The darkest day of the year is December 18, with an average of 1.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Greater Sudbury are 46.490 deg latitude, -80.990 deg longitude, and 896 ft elevation.
The topography within 2 miles of Greater Sudbury contains only modest variations in elevation, with a maximum elevation change of 312 feet, and an average elevation above sea level of 899 feet. Within 10 miles also contains only modest variations in elevation (453 feet). Within 50 miles contains very significant variations in elevation (1,312 feet).
The area within 2 miles of Greater Sudbury is covered by artificial surfaces (28%), shrubs (28%), herbaceous vegetation (18%), and water (11%), within 10 miles by shrubs (38%) and trees (35%), and within 50 miles by trees (83%) and water (11%).
This report illustrates the typical weather in Greater Sudbury, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Greater Sudbury.
For each station, the records are corrected for the elevation difference between that station and Greater Sudbury according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Greater Sudbury is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Greater Sudbury and a given station.
The stations contributing to this reconstruction are: Greater Sudbury Airport (76%, 21 kilometers, northeast), Killarney Meteorological Aeronautical Presentation System (14%, 70 kilometers, southwest), and Britt, Ont. (10%, 85 kilometers, southeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .