Average Weather in December in Lillooet Canada
The lowest daily average high temperature is 30°F on December 28.
Daily low temperatures decrease by 4°F, from 25°F to 21°F, rarely falling below 4°F or exceeding 35°F.
For reference, on August 1, the hottest day of the year, temperatures in Lillooet typically range from 56°F to 82°F, while on January 1, the coldest day of the year, they range from 21°F to 30°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
Ferlach, Austria (5,238 miles away); Kratovo, Macedonia (5,679 miles); and Sănduleşti, Romania (5,417 miles) are the far-away foreign places with temperatures most similar to Lillooet (view comparison).
The month of December in Lillooet experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 70% throughout the month.
The clearest day of the month is December 21, with clear, mostly clear, or partly cloudy conditions 31% of the time.
For reference, on January 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Lillooet, the chance of a wet day over the course of December is rapidly decreasing, starting the month at 31% and ending it at 24%.
For reference, the year's highest daily chance of a wet day is 35% on November 18, and its lowest chance is 15% on August 11.
Over the course of December in Lillooet, the chance of a day with only rain decreases from 18% to 8%, the chance of a day with mixed snow and rain remains an essentially constant 6% throughout, and the chance of a day with only snow increases from 6% to 10%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Lillooet is decreasing, starting the month at 1.6 inches, when it rarely exceeds 3.0 inches or falls below 0.4 inches, and ending the month at 0.9 inches, when it rarely exceeds 2.1 inches or falls below 0.1 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 Lillooet is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.5 inches or falling to 0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.7 inches on December 29.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Lillooet, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 15 minutes, implying an average daily decrease of 30 seconds, and weekly decrease of 3 minutes, 33 seconds.
The shortest day of the month is December 21, with 7 hours, 58 minutes of daylight and the longest day is December 1, with 8 hours, 18 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Lillooet is 7:47 AM on December 1 and the latest sunrise is 22 minutes later at 8:09 AM on December 30.
The earliest sunset is 4:02 PM on December 12 and the latest sunset is 10 minutes later at 4:12 PM on December 31.
Daylight saving time is observed in Lillooet 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 4:54 AM and sets 16 hours, 30 minutes later, at 9:24 PM, while on December 21, the shortest day of the year, it rises at 8:07 AM and sets 7 hours, 58 minutes later, at 4:04 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Lillooet is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in Lillooet is essentially constant during December, remaining around 3.7 miles per hour throughout.
For reference, on December 5, the windiest day of the year, the daily average wind speed is 3.8 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 3.1 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 Lillooet typically lasts for 5.9 months (178 days), from around April 23 to around October 19, rarely starting before April 6 or after May 11, and rarely ending before October 1 or after November 6.
The month of December in Lillooet 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 Lillooet are essentially constant during December, remaining around 1,870°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Lillooet 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 Lillooet are 50.686 deg latitude, -121.942 deg longitude, and 1,677 ft elevation.
The topography within 2 miles of Lillooet contains extreme variations in elevation, with a maximum elevation change of 4,695 feet and an average elevation above sea level of 1,628 feet. Within 10 miles also contains extreme variations in elevation (8,878 feet). Within 50 miles also contains extreme variations in elevation (9,272 feet).
The area within 2 miles of Lillooet is covered by sparse vegetation (45%), shrubs (28%), and trees (13%), within 10 miles by trees (60%) and sparse vegetation (21%), and within 50 miles by trees (60%) and sparse vegetation (21%).
This report illustrates the typical weather in Lillooet 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Lillooet.
For each station, the records are corrected for the elevation difference between that station and Lillooet 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 Lillooet is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Lillooet and a given station.
The stations contributing to this reconstruction are: Lytton, B. C. (32%, 57 kilometers, southeast); Clinton, B. C. (22%, 60 kilometers, northeast); Pemberton Automatic Weather Reporting System (24%, 71 kilometers, southwest); Big Creek (8%, 102 kilometers, northwest); and Kamloops Auto (15%, 105 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .