Average Weather in December in Lumby Canada
Daily high temperatures decrease by 5°F, from 33°F to 29°F, rarely falling below 15°F or exceeding 42°F. The lowest daily average high temperature is 29°F on December 31.
Daily low temperatures decrease by 5°F, from 24°F to 20°F, rarely falling below 3°F or exceeding 33°F. The lowest daily average low temperature is 20°F on December 31.
For reference, on August 3, the hottest day of the year, temperatures in Lumby typically range from 56°F to 82°F, while on December 30, the coldest day of the year, they range from 20°F to 29°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 in Lumby experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 69% throughout the month.
The clearest day of the month is December 6, with clear, mostly clear, or partly cloudy conditions 33% of the time.
For reference, on January 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Lumby, the chance of a wet day over the course of December is gradually decreasing, starting the month at 30% and ending it at 27%.
For reference, the year's highest daily chance of a wet day is 34% on November 10, and its lowest chance is 14% on August 10.
Over the course of December in Lumby, the chance of a day with only rain decreases from 15% to 5%, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow increases from 10% to 17%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Lumby is decreasing, starting the month at 0.9 inches, when it rarely exceeds 1.7 inches or falls below 0.2 inches, and ending the month at 0.4 inches, when it rarely exceeds 0.9 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 in Lumby is gradually increasing, starting the month at 0.6 inches, when it rarely exceeds 1.2 inches or falls below 0.1 inches, and ending the month at 1.0 inches, when it rarely exceeds 1.9 inches or falls below 0.3 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Lumby, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 2 minutes of daylight and the longest day is December 1, with 8 hours, 22 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Lumby is 7:33 AM on December 1 and the latest sunrise is 22 minutes later at 7:55 AM on December 31.
The earliest sunset is 3:52 PM on December 12 and the latest sunset is 10 minutes later at 4:02 PM on December 31.
Daylight saving time is observed in Lumby during 2018, 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 4:45 AM and sets 16 hours, 25 minutes later, at 9:10 PM, while on December 21, the shortest day of the year, it rises at 7:53 AM and sets 8 hours, 2 minutes later, at 3:55 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Lumby is essentially constant during December, remaining around 0% throughout.
For reference, on July 27, the muggiest day of the year, there are muggy conditions 1% 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
The average hourly wind speed in Lumby is essentially constant during December, remaining within 0.1 miles per hour of 3.7 miles per hour throughout.
For reference, on November 30, the windiest day of the year, the daily average wind speed is 3.8 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.
The highest daily average wind speed during December is 3.8 miles per hour on December 5.
Average Wind Speed in December
Wind Direction in December
The growing season in Lumby typically lasts for 5.5 months (167 days), from around April 28 to around October 12, rarely starting before April 7 or after May 16, and rarely ending before September 22 or after October 29.
The month of December in Lumby is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Lumby are essentially constant during December, remaining around 1,783°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Lumby 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 0.9 kWh on December 23.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Lumby are 50.250 deg latitude, -118.969 deg longitude, and 1,936 ft elevation.
The topography within 2 miles of Lumby contains very significant variations in elevation, with a maximum elevation change of 1,752 feet and an average elevation above sea level of 2,057 feet. Within 10 miles contains very significant variations in elevation (4,852 feet). Within 50 miles also contains extreme variations in elevation (8,579 feet).
The area within 2 miles of Lumby is covered by trees (29%), cropland (25%), sparse vegetation (25%), and shrubs (13%), within 10 miles by trees (76%) and sparse vegetation (10%), and within 50 miles by trees (75%) and sparse vegetation (11%).
This report illustrates the typical weather in Lumby 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
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Lumby.
For each station, the records are corrected for the elevation difference between that station and Lumby 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 Lumby is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lumby and a given station.
The stations contributing to this reconstruction are: Vernon, B. C. (77%, 16 kilometers, west); Salmon Arm Automatic Weather Reporting System (14%, 55 kilometers, northwest); and Nakusp Automatic Weather Reporting System (9%, 82 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .