Average Weather in April in Whitehorse Canada
In Whitehorse, the month of April is characterized by rapidly rising daily high temperatures, with daily highs increasing by 13°F, from 37°F to 50°F over the course of the month, and rarely exceeding 60°F or dropping below 28°F.
Daily low temperatures increase by 12°F, from 18°F to 30°F, rarely falling below 2°F or exceeding 37°F.
For reference, on July 29, the hottest day of the year, temperatures in Whitehorse typically range from 47°F to 69°F, while on January 14, the coldest day of the year, they range from -2°F to 12°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in April
The month of April in Whitehorse experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 62% throughout the month.
The clearest day of the month is April 21, with clear, mostly clear, or partly cloudy conditions 39% of the time.
For reference, on November 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on July 31, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 45%.
Cloud Cover in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Whitehorse, the chance of a wet day over the course of April is gradually increasing, starting the month at 8% and ending it at 10%.
For reference, the year's highest daily chance of a wet day is 30% on September 3, and its lowest chance is 7% on April 15.
Over the course of April in Whitehorse, the chance of a day with only rain increases from 2% to 8%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow decreases from 4% to 1%.
Probability of Precipitation in April
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during April in Whitehorse is gradually increasing, starting the month at 0.1 inches, when it rarely exceeds 0.3 inches, and ending the month at 0.4 inches, when it rarely exceeds 0.8 inches or falls below 0.1 inches.
Average Monthly Rainfall in April
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. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during April in Whitehorse is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Whitehorse, the length of the day is very rapidly increasing. From the start to the end of the month, the length of the day increases by 2 hours, 41 minutes, implying an average daily increase of 5 minutes, 34 seconds, and weekly increase of 38 minutes, 57 seconds.
The shortest day of the month is April 1, with 13 hours, 24 minutes of daylight and the longest day is April 30, with 16 hours, 5 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Whitehorse is 7:22 AM on April 1 and the earliest sunrise is 1 hour, 27 minutes earlier at 5:55 AM on April 30.
The earliest sunset is 8:46 PM on April 1 and the latest sunset is 1 hour, 14 minutes later at 10:00 PM on April 30.
Daylight saving time is observed in Whitehorse during 2017, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 4:27 AM and sets 19 hours, 9 minutes later, at 11:36 PM, while on December 21, the shortest day of the year, it rises at 10:09 AM and sets 5 hours, 38 minutes later, at 3:47 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
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 chance that a given day will be muggy in Whitehorse is essentially constant during April, remaining around 0% throughout.
Humidity Comfort Levels in April
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 is essentially constant during April, remaining within 0.1 miles per hour of 3.4 miles per hour throughout.
For reference, on September 25, the windiest day of the year, the daily average wind speed is 3.6 miles per hour, while on July 7, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.
The lowest daily average wind speed during April is 3.3 miles per hour on April 27.
Average Wind Speed in April
Wind Direction in April
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 in Whitehorse is increasing during April, rising by 1.5 kWh, from 3.5 kWh to 5.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
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 significant 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%).
This report illustrates the typical weather in Whitehorse year round, 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.
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 .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.