Average Weather at Cape Whittle Canada

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3. Cape Whittle

At Cape Whittle, the summers are cool, wet, and partly cloudy and the winters are freezing, snowy, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 5°F to 61°F and is rarely below -11°F or above 66°F.

The warm season lasts for 3.1 months, from June 23 to September 25, with an average daily high temperature above 53°F. The hottest day of the year is August 11, with an average high of 61°F and low of 52°F.

The cold season lasts for 3.3 months, from December 12 to March 21, with an average daily high temperature below 29°F. The coldest day of the year is January 30, with an average low of 5°F and high of 21°F.

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.

At Cape Whittle, 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 at Cape Whittle begins around June 19 and lasts for 4.7 months, ending around November 9. On September 4, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 52% of the time, and overcast or mostly cloudy 48% of the time.

The cloudier part of the year begins around November 9 and lasts for 7.3 months, ending around June 19. On January 31, the cloudiest day of the year, the sky is overcast or mostly cloudy 70% of the time, and clear, mostly clear, or partly cloudy 30% of the time.

Cape Whittle does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 27% to 36%, with an average value of 32%.

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 at Cape Whittle changes throughout the year.

Rain alone is the most common for 7.7 months, from April 17 to December 8. The highest chance of a day with rain alone is 35% on October 8.

Snow alone is the most common for 3.5 months, from December 14 to April 1. The highest chance of a day with snow alone is 22% on February 21.

Mixed snow and rain is the most common for 3.1 weeks, from April 1 to April 17 and from December 8 to December 14. The highest chance of a day with mixed snow and rain is 13% on December 18.

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 of the year. Cape Whittle experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Cape Whittle. The most rain falls during the 31 days centered around October 18, with an average total accumulation of 4.0 inches.

The least rain falls around February 24, with an average total accumulation of 0.6 inches.

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 of the year. Cape Whittle experiences extreme seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 6.7 months, from October 30 to May 22, 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 24, with an average total liquid-equivalent accumulation of 2.2 inches.

The snowless period of the year lasts for 5.3 months, from May 22 to October 30. The least snow falls around August 5, with an average total liquid-equivalent accumulation of 0.0 inches.

The length of the day at Cape Whittle varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 3 minutes of daylight; the longest day is June 21, with 16 hours, 24 minutes of daylight.

The earliest sunrise is at 3:49 AM on June 16, and the latest sunrise is 4 hours, 10 minutes later at 7:59 AM on December 31. The earliest sunset is at 3:57 PM on December 12, and the latest sunset is 4 hours, 17 minutes later at 8:14 PM on June 25.

Daylight saving time (DST) is not observed at Cape Whittle during 2017.

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 at Cape Whittle, 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.

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 at Cape Whittle experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from September 24 to April 12, with average wind speeds of more than 6.3 miles per hour. The windiest day of the year is December 19, with an average hourly wind speed of 7.8 miles per hour.

The calmer time of year lasts for 5.4 months, from April 12 to September 24. The calmest day of the year is July 22, with an average hourly wind speed of 4.8 miles per hour.

The predominant average hourly wind direction at Cape Whittle varies throughout the year.

The wind is most often from the north for 2.1 months, from February 26 to April 29, with a peak percentage of 37% on March 6. The wind is most often from the south for 2.5 months, from May 12 to July 29, with a peak percentage of 40% on July 16. The wind is most often from the west for 6.9 months, from July 29 to February 26, with a peak percentage of 43% on January 1.

Cape Whittle 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 2.3 months, from July 11 to September 20, with an average temperature above 52°F. The day of the year with the warmest water is August 15, with an average temperature of 57°F.

The time of year with cooler water lasts for 5.4 months, from December 1 to May 14, with an average temperature below 36°F. The day of the year with the coolest water is March 21, with an average temperature of 31°F.

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from May 9 to August 23, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest day of the year is June 26, with an average of 5.9 kWh.

The darker period of the year lasts for 3.6 months, from October 26 to February 14, with an average daily incident shortwave energy per square meter below 1.9 kWh. The darkest day of the year is December 21, with an average of 0.8 kWh.

For the purposes of this report, the geographical coordinates of Cape Whittle are 50.167 deg latitude, -60.067 deg longitude, and 0 ft elevation.

The topography within 2 miles of Cape Whittle contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 5 feet. Within 10 miles also contains only modest variations in elevation (305 feet). Within 50 miles contains only modest variations in elevation (1,165 feet).

The area within 2 miles of Cape Whittle is covered by water (93%), within 10 miles by water (83%), and within 50 miles by water (70%) and trees (20%).

This report illustrates the typical weather at Cape Whittle, 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

Cape Whittle has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Chevery, Que.; Natashquan Airport; and Heath Point Meteorological Aeronautical Presentation System.

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 .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.