Average Weather in Santa Rosalia Mexico
In Santa Rosalia, the summers are long, hot, muggy, and partly cloudy; the winters are comfortable and mostly clear; and it is dry year round. Over the course of the year, the temperature typically varies from 58°F to 95°F and is rarely below 54°F or above 98°F.
Based on the beach/pool score, the best times of year to visit Santa Rosalia for hot-weather activities are from early June to early July and from mid September to late October.
The hot season lasts for 4.2 months, from May 31 to October 7, with an average daily high temperature above 90°F. The hottest day of the year is August 7, with an average high of 95°F and low of 82°F.
The cool season lasts for 3.2 months, from November 30 to March 5, with an average daily high temperature below 76°F. The coldest day of the year is January 22, with an average low of 58°F and high of 71°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
In Santa Rosalia, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Santa Rosalia begins around April 16 and lasts for 2.7 months, ending around July 7. On June 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 88% of the time, and overcast or mostly cloudy 12% of the time.
The cloudier part of the year begins around July 7 and lasts for 9.3 months, ending around April 16. On July 31, the cloudiest day of the year, the sky is overcast or mostly cloudy 50% of the time, and clear, mostly clear, or partly cloudy 50% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Santa Rosalia varies throughout the year.
The wetter season lasts 1.8 months, from July 31 to September 24, with a greater than 6% chance of a given day being a wet day. The chance of a wet day peaks at 12% on August 25.
The drier season lasts 10 months, from September 24 to July 31. The smallest chance of a wet day is 0% on May 5.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 12% on August 25.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Santa Rosalia experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 2.1 months, from August 2 to October 4, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around September 3, with an average total accumulation of 1.2 inches.
The rainless period of the year lasts for 9.9 months, from October 4 to August 2. The least rain falls around May 8, with an average total accumulation of 0.0 inches.
Average Monthly Rainfall
The length of the day in Santa Rosalia varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 25 minutes of daylight; the longest day is June 20, with 13 hours, 52 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:17 AM on April 3, and the latest sunrise is 1 hour, 21 minutes later at 7:38 AM on October 30. The earliest sunset is at 5:34 PM on November 30, and the latest sunset is 2 hours, 54 minutes later at 8:28 PM on June 30.
Daylight saving time (DST) is observed in Santa Rosalia during 2021, starting in the spring on April 4, lasting 6.8 months, and ending in the fall on October 31.
Sunrise & Sunset with Twilight and Daylight Saving Time
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases
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.
Santa Rosalia experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.7 months, from June 24 to October 15, during which time the comfort level is muggy, oppressive, or miserable at least 20% of the time. The muggiest day of the year is August 28, with muggy conditions 81% of the time.
The least muggy day of the year is March 12, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 in Santa Rosalia experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.8 months, from November 4 to May 31, with average wind speeds of more than 8.1 miles per hour. The windiest day of the year is December 11, with an average hourly wind speed of 9.8 miles per hour.
The calmer time of year lasts for 5.2 months, from May 31 to November 4. The calmest day of the year is August 4, with an average hourly wind speed of 6.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Santa Rosalia varies throughout the year.
The wind is most often from the west for 7.4 months, from March 4 to October 17, with a peak percentage of 71% on May 29. The wind is most often from the north for 4.6 months, from October 17 to March 4, with a peak percentage of 66% on January 1.
Santa Rosalia 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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.3 months, from July 8 to October 18, with an average temperature above 80°F. The day of the year with the warmest water is September 2, with an average temperature of 84°F.
The time of year with cooler water lasts for 4.2 months, from December 15 to April 21, with an average temperature below 68°F. The day of the year with the coolest water is January 27, with an average temperature of 64°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Santa Rosalia throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Santa Rosalia for general outdoor tourist activities are from early March to mid June and from mid October to mid December, with a peak score in the first week of November.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Santa Rosalia for hot-weather activities are from early June to early July and from mid September to late October, with a peak score in the second week of October.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures in Santa Rosalia 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
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
Growing Degree Days
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 experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 2.6 months, from April 17 to July 5, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest day of the year is June 4, with an average of 8.3 kWh.
The darker period of the year lasts for 3.0 months, from November 7 to February 5, with an average daily incident shortwave energy per square meter below 4.8 kWh. The darkest day of the year is December 18, with an average of 3.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Santa Rosalia are 27.340 deg latitude, -112.268 deg longitude, and 62 ft elevation.
The topography within 2 miles of Santa Rosalia contains significant variations in elevation, with a maximum elevation change of 748 feet and an average elevation above sea level of 176 feet. Within 10 miles contains significant variations in elevation (2,589 feet). Within 50 miles contains large variations in elevation (6,411 feet).
The area within 2 miles of Santa Rosalia is covered by shrubs (52%) and water (44%), within 10 miles by shrubs (50%) and water (49%), and within 50 miles by water (50%) and shrubs (49%).
This report illustrates the typical weather in Santa Rosalia, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Santa Rosalia is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.
The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Santa Rosalia, according to the International Standard Atmosphere .
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
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 airports 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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.