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Average Weather in Whitehorse Canada

In Whitehorse, the temperature typically varies from -2°F to 69°F over the course of the year, and is rarely below -33°F or above 79°F.

The warm season lasts for 3.6 months, from May 18 to September 7, with an average daily high temperature above 57°F. The hottest day of the year is July 29, with an average high of 69°F and low of 47°F.

The cold season lasts for 3.5 months, from November 11 to February 26, with an average daily high temperature below 24°F. The coldest day of the year is January 14, with an average low of -2°F and high of 12°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecfrigidfrigidfreezingfreezingchillychillycoldcoldcoolcoolcomfortablecomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sun

The length of the day in Whitehorse varies extremely over the course of the year. In 2017, the shortest day is December 21, with 5 hours, 38 minutes of daylight; the longest day is June 21, with 19 hours, 9 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 4:27 AM on June 19, and the latest sunrise is 5 hours, 44 minutes later at 10:10 AM on December 26. The earliest sunset is at 3:46 PM on December 16, and the latest sunset is 7 hours, 51 minutes later at 11:36 PM on June 22.

Daylight saving time (DST) is observed in Whitehorse 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

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Clouds

In Whitehorse, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year in Whitehorse begins around April 1 and lasts for 5.8 months, ending around September 24. On July 31, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 45% of the time, and overcast or mostly cloudy 55% of the time.

The cloudier part of the year begins around September 24 and lasts for 6.2 months, ending around April 1. On November 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 71% of the time, and clear, mostly clear, or partly cloudy 29% of the time.

Cloud Cover

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecNov 2871%Nov 2871%Jul 3155%Jul 3155%Apr 163%Apr 163%Sep 2463%Sep 2463%overcastovercastmostly cloudymostly cloudypartly cloudypartly cloudymostly clearmostly clearclearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Whitehorse varies throughout the year.

The wetter season lasts 5.2 months, from May 31 to November 5, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 30% on September 3.

The drier season lasts 6.8 months, from November 5 to May 31. The smallest chance of a wet day is 7% on April 15.

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 Whitehorse changes throughout the year.

Rain alone is the most common for 6.5 months, from April 9 to October 25. The highest chance of a day with rain alone is 30% on September 3.

Snow alone is the most common for 5.5 months, from October 25 to April 9. The highest chance of a day with snow alone is 14% on December 31.

Daily Chance of Precipitation

snowsnowrainrainsnowsnow0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecSep 330%Sep 330%Apr 157%Apr 157%Oct 2522%Oct 2522%Jan 116%Jan 116%May 3120%May 3120%snowsnowmixedmixedrainrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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. Whitehorse experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.6 months, from May 8 to October 28, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 5, with an average total accumulation of 1.7 inches.

The rainless period of the year lasts for 6.4 months, from October 28 to May 8. The least rain falls around February 13, with and average total accumulation of 0.0 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

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. Whitehorse experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.1 months, from September 17 to April 21, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 27, with an average total liquid-equivalent accumulation of 0.6 inches.

The snowless period of the year lasts for 4.9 months, from April 21 to September 17. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Humidity

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 Whitehorse, 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, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 30%Jul 30%drydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Whitehorse does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 3.3 miles per hour throughout.

Average Wind Speed

0.0 mph0.5 mph1.0 mph1.5 mph2.0 mph2.5 mph3.0 mph3.5 mph4.0 mph4.5 mph5.0 mph5.5 mph6.0 mphJanFebMarAprMayJunJulAugSepOctNovDecSep 253.6 mphSep 253.6 mphJul 73.0 mphJul 73.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Whitehorse is from the south throughout the year.

Wind Direction

0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestwestsouthsoutheasteastnorthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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 April 26 to August 9, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest day of the year is June 13, with an average of 6.1 kWh.

The darker period of the year lasts for 4.2 months, from October 16 to February 21, with an average daily incident shortwave energy per square meter below 1.4 kWh. The darkest day of the year is December 22, with an average of 0.2 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Whitehorse are 60.716 deg latitude, -135.054 deg longitude, and 2,375 ft elevation.

The topography within 2 miles of Whitehorse contains significant variations in elevation, with a maximum elevation change of 512 feet, and an average elevation above sea level of 2,248 feet. Within 10 miles contains extreme variations in elevation (3,806 feet). Within 50 miles also contains extreme variations in elevation (5,981 feet).

The area within 2 miles of Whitehorse is covered by trees (38%), sparse vegetation (33%), and shrubs (13%), within 10 miles by trees (75%) and shrubs (12%), and within 50 miles by trees (58%) and shrubs (15%).

Data Sources

This report illustrates the typical weather in Whitehorse, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Whitehorse.

For each station, the records are corrected for the elevation difference between that station and Whitehorse 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 Whitehorse is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Whitehorse and a given station.

The stations contributing to this reconstruction are: Erik Nielsen Whitehorse International Airport (100%, 1.0 kilometers, southwest) and Teslin Airport (0.2%, 141 kilometers, southeast).

Other Data

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 .