Average Weather in December at Sheringham Automatic Weather Reporting System Canada
At Sheringham Automatic Weather Reporting System, the month of December is characterized by essentially constant daily high temperatures, with daily highs around 47°F throughout the month, rarely exceeding 54°F or dropping below 40°F.
Daily low temperatures decrease by 3°F, from 41°F to 38°F, rarely falling below 26°F or exceeding 47°F.
For reference, on August 2, the hottest day of the year, temperatures at Sheringham Automatic Weather Reporting System typically range from 53°F to 66°F, while on January 2, the coldest day of the year, they range from 38°F to 46°F.
Average High and Low Temperature in December
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.
Average Hourly Temperature in December
The month of December at Sheringham Automatic Weather Reporting System experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 72% throughout the month.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 29% of the time.
For reference, on January 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Sheringham Automatic Weather Reporting System, the chance of a wet day over the course of December is decreasing, starting the month at 61% and ending it at 55%.
For reference, the year's highest daily chance of a wet day is 63% on November 17, and its lowest chance is 8% on August 1.
Over the course of December at Sheringham Automatic Weather Reporting System, the chance of a day with only rain decreases from 59% to 49%, the chance of a day with mixed snow and rain increases from 1% to 5%, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in December
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 December at Sheringham Automatic Weather Reporting System is rapidly decreasing, starting the month at 9.1 inches, when it rarely exceeds 14.0 inches or falls below 3.4 inches, and ending the month at 7.6 inches, when it rarely exceeds 11.1 inches or falls below 4.2 inches.
Average Monthly Rainfall in December
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 December at Sheringham Automatic Weather Reporting System is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.7 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December at Sheringham Automatic Weather Reporting System, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 19 minutes of daylight and the longest day is December 1, with 8 hours, 37 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month at Sheringham Automatic Weather Reporting System is 7:46 AM on December 1 and the latest sunrise is 21 minutes later at 8:07 AM on December 31.
The earliest sunset is 4:20 PM on December 11 and the latest sunset is 10 minutes later at 4:30 PM on December 31.
Daylight saving time is observed at Sheringham Automatic Weather Reporting System during 2017, but it neither starts nor ends during December, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:14 AM and sets 16 hours, 6 minutes later, at 9:20 PM, while on December 21, the shortest day of the year, it rises at 8:04 AM and sets 8 hours, 19 minutes later, at 4:23 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
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 at Sheringham Automatic Weather Reporting System is essentially constant during December, remaining around 0% throughout.
For reference, on June 27, 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.
Humidity Comfort Levels in December
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 Sheringham Automatic Weather Reporting System is essentially constant during December, remaining within 0.1 miles per hour of 3.8 miles per hour throughout.
For reference, on December 4, the windiest day of the year, the daily average wind speed is 3.8 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 2.2 miles per hour.
The highest daily average wind speed during December is 3.8 miles per hour on December 4.
Average Wind Speed in December
Wind Direction in December
Sheringham Automatic Weather Reporting System 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 surface water temperature at Sheringham Automatic Weather Reporting System is essentially constant during December, remaining within 1°F of 48°F throughout.
Average Water Temperature in December
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 at Sheringham Automatic Weather Reporting System is essentially constant during December, remaining within 0.1 kWh of 0.9 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 0.8 kWh on December 26.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Sheringham Automatic Weather Reporting System are 48.378 deg latitude, -123.920 deg longitude, and 0 ft elevation.
The topography within 2 miles of Sheringham Automatic Weather Reporting System contains significant variations in elevation, with a maximum elevation change of 791 feet and an average elevation above sea level of 103 feet. Within 10 miles contains significant variations in elevation (2,910 feet). Within 50 miles contains large variations in elevation (7,874 feet).
The area within 2 miles of Sheringham Automatic Weather Reporting System is covered by water (67%) and trees (28%), within 10 miles by water (55%) and trees (41%), and within 50 miles by trees (52%) and water (37%).
This report illustrates the typical weather at Sheringham Automatic Weather Reporting System 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
Sheringham Automatic Weather Reporting System 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 include but are not limited to Malahat Automatic Weather Reporting System; Esquimalt Harbour, B. C.; William R Fairchild International Airport; Victoria International Airport; Victoria Harbour; Victoria Automatic Weather Reporting System; Victoria University; and Discovery Island.
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.