December Weather in Grande Cache CanadaDaily high temperatures decrease by 4°F, from 29°F to 26°F, rarely falling below 2°F or exceeding 45°F. The lowest daily average high temperature is 26°F on December 27. Daily low temperatures decrease by 4°F, from 8°F to 5°F, rarely falling below -20°F or exceeding 26°F. The lowest daily average low temperature is 5°F on December 31. For reference, on August 4, the hottest day of the year, temperatures in Grande Cache typically range from 42°F to 70°F, while on December 28, the coldest day of the year, they range from 5°F to 26°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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. Lycksele, Sweden (3,953 miles away) and Damal, Turkey (5,777 miles) are the far-away foreign places with temperatures most similar to Grande Cache (view comparison). CloudsThe month of December in Grande Cache experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 64% throughout the month. The clearest day of the month is December 5, with clear, mostly clear, or partly cloudy conditions 37% of the time. For reference, on February 25, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Grande Cache, the chance of a wet day over the course of December is gradually increasing, starting the month at 11% and ending it at 13%. For reference, the year's highest daily chance of a wet day is 42% on June 21, and its lowest chance is 8% on February 15. Over the course of December in Grande Cache, the chance of a day with only rain remains an essentially constant 1% throughout, 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 remains an essentially constant 8% throughout. RainfallTo 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 December in Grande Cache is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches. The lowest average 31-day accumulation is 0.1 inches on December 22. SnowfallAs with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day snowfall during December in Grande Cache is gradually decreasing, starting the month at 4.4 inches, when it rarely exceeds 9.4 inches or falls below 0.9 inches, and ending the month at 4.0 inches, when it rarely exceeds 8.5 inches or falls below 0.8 inches. SunOver the course of December in Grande Cache, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 16 minutes, implying an average daily decrease of 32 seconds, and weekly decrease of 3 minutes, 41 seconds. The shortest day of the month is December 21, with 7 hours, 24 minutes of daylight and the longest day is December 1, with 7 hours, 46 minutes of daylight. The earliest sunrise of the month in Grande Cache is 8:52 AM on December 1 and the latest sunrise is 22 minutes later at 9:15 AM on December 29. The earliest sunset is 4:34 PM on December 13 and the latest sunset is 11 minutes later at 4:45 PM on December 31. Daylight saving time is observed in Grande Cache during 2024, but it neither starts nor ends during December, so the entire month is in daylight saving time. For reference, on June 20, the longest day of the year, the Sun rises at 5:24 AM and sets 17 hours, 7 minutes later, at 10:31 PM, while on December 21, the shortest day of the year, it rises at 9:13 AM and sets 7 hours, 24 minutes later, at 4:36 PM. The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. MoonThe figure below presents a compact representation of key lunar data for December 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
HumidityWe 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 Grande Cache is essentially constant during December, remaining around 0% throughout. For reference, on August 14, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Grande Cache is essentially constant during December, remaining within 0.1 miles per hour of 6.3 miles per hour throughout. For reference, on December 9, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 4.1 miles per hour. The highest daily average wind speed during December is 6.4 miles per hour on December 9. The hourly average wind direction in Grande Cache throughout December is predominantly from the south, with a peak proportion of 47% on December 4. Growing SeasonDefinitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). The growing season in Grande Cache typically lasts for 1.7 months (52 days), from around June 26 to around August 17, rarely starting before June 4, or ending after September 8. The month of December in Grande Cache is reliably fully outside of the growing season. Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F. The average accumulated growing degree days in Grande Cache are essentially constant during December, remaining around 778°F throughout. Solar EnergyThis 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 Grande Cache is essentially constant during December, remaining within 0.1 kWh of 0.7 kWh throughout. The lowest average daily incident shortwave solar energy during December is 0.7 kWh on December 23. TopographyFor the purposes of this report, the geographical coordinates of Grande Cache are 53.883 deg latitude, -119.136 deg longitude, and 4,019 ft elevation. The topography within 2 miles of Grande Cache contains very significant variations in elevation, with a maximum elevation change of 1,732 feet and an average elevation above sea level of 3,763 feet. Within 10 miles contains very significant variations in elevation (5,049 feet). Within 50 miles also contains extreme variations in elevation (8,369 feet). The area within 2 miles of Grande Cache is covered by trees (72%) and sparse vegetation (11%), within 10 miles by trees (88%), and within 50 miles by trees (73%) and sparse vegetation (12%). Data SourcesThis report illustrates the typical weather in Grande Cache, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere is only a single weather station, Henderickson Automatic Weather Reporting System, in our network suitable to be used as a proxy for the historical temperature and dew point records of Grande Cache. At a distance of 46 kilometers from Grande Cache, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records. The station records are corrected for the elevation difference between the station and Grande Cache according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis. Other DataAll data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. Please review our full terms contained on our Terms of Service page. |