Average Weather in December in Arinsal Andorra
In Arinsal, the month of December is characterized by gradually falling daily high temperatures, with daily highs decreasing by 2°F, from 35°F to 32°F over the course of the month, and rarely exceeding 44°F or dropping below 23°F.
Daily low temperatures decrease by 3°F, from 20°F to 17°F, rarely falling below 7°F or exceeding 28°F.
For reference, on August 4, the hottest day of the year, temperatures in Arinsal typically range from 45°F to 66°F, while on January 15, the coldest day of the year, they range from 17°F to 32°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 Arinsal experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 56% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 55% on December 17.
The clearest day of the month is December 17, with clear, mostly clear, or partly cloudy conditions 45% of the time.
For reference, on November 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 20, 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. In Arinsal, the chance of a wet day over the course of December is essentially constant, remaining around 20% throughout.
For reference, the year's highest daily chance of a wet day is 29% on May 8, and its lowest chance is 15% on July 14.
Over the course of December in Arinsal, the chance of a day with only rain decreases from 3% to 1%, the chance of a day with mixed snow and rain decreases from 6% to 3%, and the chance of a day with only snow increases from 12% to 16%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Arinsal is gradually decreasing, starting the month at 0.4 inches, when it rarely exceeds 1.2 inches, and ending the month at 0.1 inches, when it rarely exceeds 0.4 inches or falls below -0.0 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 Arinsal is essentially constant, remaining about 1.0 inches throughout, and rarely exceeding 2.1 inches or falling below 0.1 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Arinsal, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 3 minutes of daylight and the longest day is December 1, with 9 hours, 18 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Arinsal is 8:04 AM on December 1 and the latest sunrise is 20 minutes later at 8:23 AM on December 31.
The earliest sunset is 5:20 PM on December 9 and the latest sunset is 10 minutes later at 5:30 PM on December 31.
Daylight saving time is observed in Arinsal 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 6:16 AM and sets 15 hours, 19 minutes later, at 9:35 PM, while on December 21, the shortest day of the year, it rises at 8:20 AM and sets 9 hours, 3 minutes later, at 5:23 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Arinsal is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in Arinsal is essentially constant during December, remaining within 0.2 miles per hour of 6.8 miles per hour throughout.
For reference, on April 6, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on August 27, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Arinsal typically lasts for 2.9 months (90 days), from around June 14 to around September 12, rarely starting before May 26 or after July 6, and rarely ending before August 22 or after October 4.
The month of December in Arinsal 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 Arinsal is essentially constant during December, remaining around 646°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Arinsal is essentially constant during December, remaining within 0.1 kWh of 1.9 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.8 kWh on December 19.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Arinsal are 42.572 deg latitude, 1.485 deg longitude, and 6,368 ft elevation.
The topography within 2 miles of Arinsal contains extreme variations in elevation, with a maximum elevation change of 4,623 feet and an average elevation above sea level of 6,205 feet. Within 10 miles also contains extreme variations in elevation (7,451 feet). Within 50 miles also contains extreme variations in elevation (10,591 feet).
The area within 2 miles of Arinsal is covered by trees (57%) and bare soil (30%), within 10 miles by trees (38%) and grassland (20%), and within 50 miles by trees (51%) and grassland (17%).
This report illustrates the typical weather in Arinsal 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Arinsal.
For each station, the records are corrected for the elevation difference between that station and Arinsal 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 Arinsal is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Arinsal and a given station.
The stations contributing to this reconstruction are: Saint-Girons - Antichan (25%, 58 kilometers, northwest); Carcassonne-Salvaza (17%, 98 kilometers, northeast); Perpignan–Rivesaltes Airport (16%, 115 kilometers, east); Aeroport de Girona - Costa Brava (16%, 129 kilometers, southeast); Barcelona–El Prat Airport (13%, 150 kilometers, south); and Reus Airport (13%, 161 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .