Average Weather in Langley Canada
In Langley, the summers are comfortable and partly cloudy and the winters are chilly, wet, and mostly cloudy. Over the course of the year, the temperature typically varies from 33°F to 75°F and is rarely below 21°F or above 84°F.
The warm season lasts for 3.1 months, from June 15 to September 17, with an average daily high temperature above 68°F. The hottest day of the year is August 3, with an average high of 75°F and low of 56°F.
The cool season lasts for 3.1 months, from November 15 to February 19, with an average daily high temperature below 48°F. The coldest day of the year is January 2, with an average low of 33°F and high of 41°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
In Langley, 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 Langley begins around June 12 and lasts for 3.7 months, ending around October 2. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 72% of the time, and overcast or mostly cloudy 28% of the time.
The cloudier part of the year begins around October 2 and lasts for 8.3 months, ending around June 12. On January 13, 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 Langley varies significantly throughout the year.
The wetter season lasts 6.4 months, from October 10 to April 22, with a greater than 36% chance of a given day being a wet day. The chance of a wet day peaks at 60% on November 18.
The drier season lasts 5.6 months, from April 22 to October 10. The smallest chance of a wet day is 11% on August 5.
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 throughout the year is rain alone, with a peak probability of 59% on November 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 of the year. Langley experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Langley. The most rain falls during the 31 days centered around November 19, with an average total accumulation of 8.4 inches.
The least rain falls around July 31, with an average total accumulation of 0.9 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 of the year. Langley experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.5 months, from November 21 to March 6, 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 3, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 8.5 months, from March 6 to November 21. The least snow falls around July 23, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Langley varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 13 minutes of daylight; the longest day is June 21, with 16 hours, 13 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:05 AM on June 16, and the latest sunrise is 2 hours, 60 minutes later at 8:04 AM on December 31. The earliest sunset is at 4:12 PM on December 11, and the latest sunset is 5 hours, 7 minutes later at 9:19 PM on June 25.
Daylight saving time (DST) is observed in Langley 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
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 Langley, 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 1% of 1% 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 Langley experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.7 months, from October 19 to April 11, with average wind speeds of more than 2.3 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 3.1 miles per hour.
The calmer time of year lasts for 6.3 months, from April 11 to October 19. The calmest day of the year is August 10, with an average hourly wind speed of 1.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Langley varies throughout the year.
The wind is most often from the south for 8.0 months, from March 13 to November 12, with a peak percentage of 60% on June 22. The wind is most often from the east for 4.0 months, from November 12 to March 13, with a peak percentage of 50% on January 1.
Langley 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 some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.0 months, from June 17 to September 17, with an average temperature above 56°F. The day of the year with the warmest water is August 1, with an average temperature of 59°F.
The time of year with cooler water lasts for 4.5 months, from November 23 to April 7, with an average temperature below 48°F. The day of the year with the coolest water is January 30, with an average temperature of 45°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 extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.3 months, from May 12 to August 21, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is July 20, with an average of 6.6 kWh.
The darker period of the year lasts for 3.9 months, from October 22 to February 20, with an average daily incident shortwave energy per square meter below 2.0 kWh. The darkest day of the year is December 25, with an average of 0.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Langley are 49.083 deg latitude, -122.586 deg longitude, and 230 ft elevation.
The topography within 2 miles of Langley contains only modest variations in elevation, with a maximum elevation change of 344 feet and an average elevation above sea level of 225 feet. Within 10 miles contains only modest variations in elevation (1,083 feet). Within 50 miles contains very significant variations in elevation (10,771 feet).
The area within 2 miles of Langley is covered by trees (51%), cropland (30%), and shrubs (11%), within 10 miles by cropland (54%) and trees (26%), and within 50 miles by trees (45%) and water (28%).
This report illustrates the typical weather in Langley, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Langley.
For each station, the records are corrected for the elevation difference between that station and Langley 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 Langley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Langley and a given station.
The stations contributing to this reconstruction are: P. Meadows Coastal Station Automatic Weather Reporting System (31%, 15 kilometers, northwest); White Rock Automatic Weather Reporting System (31%, 15 kilometers, southwest); Abbotsford International Airport (27%, 17 kilometers, east); and Bellingham International Airport (11%, 32 kilometers, south).
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.