Average Weather in December in Rosarito Mexico
Daily high temperatures decrease by 2°F, from 67°F to 65°F, rarely falling below 58°F or exceeding 75°F. The lowest daily average high temperature is 65°F on December 25.
Daily low temperatures decrease by 2°F, from 51°F to 49°F, rarely falling below 44°F or exceeding 57°F. The lowest daily average low temperature is 49°F on December 28.
For reference, on August 26, the hottest day of the year, temperatures in Rosarito typically range from 65°F to 76°F, while on December 27, the coldest day of the year, they range from 49°F to 65°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
Minas de Marcona, Peru (4,304 miles away); Sauzal, Spain (5,756 miles); and Albertina, South Africa (10,071 miles) are the far-away foreign places with temperatures most similar to Rosarito (view comparison).
The month of December in Rosarito experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 37% throughout the month. The highest chance of overcast or mostly cloudy conditions is 39% on December 28.
The clearest day of the month is December 3, with clear, mostly clear, or partly cloudy conditions 65% of the time.
For reference, on February 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 43%, while on September 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rosarito, the chance of a wet day over the course of December is increasing, starting the month at 11% and ending it at 16%.
For reference, the year's highest daily chance of a wet day is 18% on February 21, and its lowest chance is 0% on June 27.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Rosarito is increasing, starting the month at 1.0 inches, when it rarely exceeds 2.4 inches, and ending the month at 1.5 inches, when it rarely exceeds 4.0 inches or falls below 0.1 inches.
Average Monthly Rainfall in December
Over the course of December in Rosarito, the length of the day is essentially constant. The shortest day of the month is December 21, with 10 hours, 2 minutes of daylight and the longest day is December 1, with 10 hours, 11 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Rosarito is 6:31 AM on December 1 and the latest sunrise is 18 minutes later at 6:49 AM on December 31.
The earliest sunset is 4:42 PM on December 4 and the latest sunset is 11 minutes later at 4:53 PM on December 31.
Daylight saving time is observed in Rosarito 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 5:41 AM and sets 14 hours, 17 minutes later, at 7:58 PM, while on December 21, the shortest day of the year, it rises at 6:45 AM and sets 10 hours, 2 minutes later, at 4:47 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Rosarito is essentially constant during December, remaining around 0% throughout.
For reference, on August 24, the muggiest day of the year, there are muggy conditions 29% 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 Rosarito is essentially constant during December, remaining within 0.2 miles per hour of 8.0 miles per hour throughout.
For reference, on December 11, the windiest day of the year, the daily average wind speed is 8.2 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.
The highest daily average wind speed during December is 8.2 miles per hour on December 11.
Average Wind Speed in December
Wind Direction in December
Rosarito 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 in Rosarito is gradually decreasing during December, falling by 2°F, from 62°F to 60°F, over the course of the month.
Average Water Temperature in December
Temperatures in Rosarito are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Rosarito are increasing during December, increasing by 212°F, from 4,316°F to 4,529°F, over the course of the month.
Growing Degree Days in December
The average daily incident shortwave solar energy in Rosarito is essentially constant during December, remaining within 0.1 kWh of 3.3 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 3.2 kWh on December 22.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Rosarito are 32.360 deg latitude, -117.046 deg longitude, and 197 ft elevation.
The topography within 2 miles of Rosarito contains significant variations in elevation, with a maximum elevation change of 548 feet and an average elevation above sea level of 183 feet. Within 10 miles contains significant variations in elevation (2,372 feet). Within 50 miles contains large variations in elevation (6,483 feet).
The area within 2 miles of Rosarito is covered by grassland (66%), artificial surfaces (15%), and water (15%), within 10 miles by water (46%) and grassland (26%), and within 50 miles by water (53%) and shrubs (31%).
This report illustrates the typical weather in Rosarito 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Rosarito.
For each station, the records are corrected for the elevation difference between that station and Rosarito 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 Rosarito is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rosarito and a given station.
The stations contributing to this reconstruction are: General Abelardo L. Rodríguez International Airport (52%, 21 kilometers, north) and Ream Field (48%, 24 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .