Average Weather at Churchill Airport Canada
At Churchill Airport, the summers are cool and mostly cloudy and the winters are frigid, snowy, windy, and overcast. Over the course of the year, the temperature typically varies from -20°F to 66°F and is rarely below -34°F or above 78°F.
The warm season lasts for 3.3 months, from June 7 to September 17, with an average daily high temperature above 51°F. The hottest day of the year is July 24, with an average high of 66°F and low of 49°F.
The cold season lasts for 3.5 months, from December 1 to March 15, with an average daily high temperature below 8°F. The coldest day of the year is January 21, with an average low of -20°F and high of -6°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
At Churchill Airport, 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 Churchill Airport begins around April 24 and lasts for 6.3 months, ending around November 2. On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 50% of the time, and overcast or mostly cloudy 50% of the time.
The cloudier part of the year begins around November 2 and lasts for 5.7 months, ending around April 24. On January 30, the cloudiest day of the year, the sky is overcast or mostly cloudy 87% of the time, and clear, mostly clear, or partly cloudy 13% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Churchill Airport varies throughout the year.
The wetter season lasts 6.3 months, from April 23 to November 1, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 29% on September 6.
The drier season lasts 5.7 months, from November 1 to April 23. The smallest chance of a wet day is 5% on January 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 at Churchill Airport changes throughout the year.
Snow alone is the most common for 6.6 months, from October 27 to May 15. The highest chance of a day with snow alone is 11% on November 10.
Rain alone is the most common for 5.4 months, from May 15 to October 27. The highest chance of a day with rain alone is 28% on September 3.
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. Churchill Airport experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 5.8 months, from May 6 to November 1, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 24, with an average total accumulation of 2.7 inches.
The rainless period of the year lasts for 6.2 months, from November 1 to May 6. The least rain falls around January 4, with an average total accumulation of 0.0 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. Churchill Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 8.7 months, from September 28 to June 19, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around April 29, with an average total liquid-equivalent accumulation of 0.8 inches.
The snowless period of the year lasts for 3.3 months, from June 19 to September 28. The least snow falls around August 17, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day at Churchill Airport varies extremely over the course of the year. In 2017, the shortest day is December 21, with 6 hours, 15 minutes of daylight; the longest day is June 20, with 18 hours, 25 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:05 AM on June 18, and the latest sunrise is 5 hours, 3 minutes later at 9:08 AM on December 27. The earliest sunset is at 3:20 PM on December 15, and the latest sunset is 7 hours, 10 minutes later at 10:30 PM on June 23.
Daylight saving time (DST) is observed at Churchill Airport 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 at Churchill Airport, 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
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 Churchill Airport experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 8.2 months, from September 3 to May 9, with average wind speeds of more than 6.6 miles per hour. The windiest day of the year is November 11, with an average hourly wind speed of 7.9 miles per hour.
The calmer time of year lasts for 3.8 months, from May 9 to September 3. The calmest day of the year is July 22, with an average hourly wind speed of 5.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction at Churchill Airport varies throughout the year.
The wind is most often from the north for 7.3 months, from March 11 to October 19, with a peak percentage of 40% on May 3. The wind is most often from the west for 4.7 months, from October 19 to March 11, with a peak percentage of 53% on January 1.
Churchill Airport 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 1.7 months, from July 29 to September 21, with an average temperature above 44°F. The day of the year with the warmest water is August 22, with an average temperature of 48°F.
The time of year with cooler water lasts for 7.2 months, from November 11 to June 16, with an average temperature below 33°F. The day of the year with the coolest water is February 5, with an average temperature of 29°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 3.5 months, from April 24 to August 9, with an average daily incident shortwave energy per square meter above 4.8 kWh. The brightest day of the year is June 6, with an average of 6.0 kWh.
The darker period of the year lasts for 4.1 months, from October 15 to February 19, 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 0.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Churchill Airport are 58.741 deg latitude, -94.073 deg longitude, and 36 ft elevation.
The topography within 2 miles of Churchill Airport contains only modest variations in elevation, with a maximum elevation change of 102 feet and an average elevation above sea level of 47 feet. Within 10 miles also contains only modest variations in elevation (157 feet). Within 50 miles also contains only modest variations in elevation (364 feet).
The area within 2 miles of Churchill Airport is covered by sparse vegetation (48%), trees (21%), and grassland (12%), within 10 miles by water (47%) and trees (26%), and within 50 miles by water (45%) and sparse vegetation (24%).
This report illustrates the typical weather at Churchill Airport, 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
Churchill Airport 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.There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.
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.