Average Weather in Antofagasta Chile
In Antofagasta, the summers are warm and arid; the winters are long, cool, and dry; and it is mostly clear year round. Over the course of the year, the temperature typically varies from 55°F to 77°F and is rarely below 51°F or above 80°F.
Based on the tourism score, the best time of year to visit Antofagasta for warm-weather activities is from early October to early May.
The warm season lasts for 3.1 months, from December 21 to March 23, with an average daily high temperature above 74°F. The hottest day of the year is January 27, with an average high of 77°F and low of 65°F.
The cool season lasts for 4.0 months, from May 30 to September 29, with an average daily high temperature below 67°F. The coldest day of the year is July 17, with an average low of 55°F and high of 65°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 Antofagasta, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Antofagasta begins around August 2 and lasts for 4.0 months, ending around December 4. On September 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 13% of the time.
The cloudier part of the year begins around December 4 and lasts for 8.0 months, ending around August 2. On June 14, the cloudiest day of the year, the sky is overcast or mostly cloudy 27% of the time, and clear, mostly clear, or partly cloudy 73% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
Antofagasta does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 0% to 1%, with an average value of 0%.
Daily Chance of Precipitation
The length of the day in Antofagasta varies over the course of the year. In 2019, the shortest day is June 21, with 10 hours, 41 minutes of daylight; the longest day is December 22, with 13 hours, 36 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:46 AM on November 29, and the latest sunrise is 1 hour, 24 minutes later at 8:10 AM on August 11. The earliest sunset is at 6:02 PM on June 7, and the latest sunset is 2 hours, 32 minutes later at 8:33 PM on January 14.
Daylight saving time (DST) is observed in Antofagasta during 2019, starting in the spring on August 11 and ending in the fall on May 11.
Sunrise & Sunset with Twilight and Daylight Saving Time
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.
The perceived humidity level in Antofagasta, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 2% of 2% throughout.
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 Antofagasta experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.5 months, from September 19 to April 4, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is January 24, with an average hourly wind speed of 6.9 miles per hour.
The calmer time of year lasts for 5.5 months, from April 4 to September 19. The calmest day of the year is June 5, with an average hourly wind speed of 5.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Antofagasta varies throughout the year.
The wind is most often from the south for 3.5 months, from April 26 to August 12, with a peak percentage of 44% on May 9. The wind is most often from the west for 8.5 months, from August 12 to April 26, with a peak percentage of 65% on January 1.
Antofagasta 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 2.7 months, from January 1 to March 23, with an average temperature above 69°F. The day of the year with the warmest water is February 6, with an average temperature of 71°F.
The time of year with cooler water lasts for 4.2 months, from June 15 to October 23, with an average temperature below 62°F. The day of the year with the coolest water is August 14, with an average temperature of 60°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Antofagasta 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 time of year to visit Antofagasta for general outdoor tourist activities is from early October to early May, with a peak score in the second week of March.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Antofagasta for hot-weather activities is from late December to mid March, with a peak score in the last week of January.
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 Antofagasta 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
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
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 4.2 months, from October 16 to February 22, with an average daily incident shortwave energy per square meter above 8.0 kWh. The brightest day of the year is December 12, with an average of 8.8 kWh.
The darker period of the year lasts for 3.1 months, from May 4 to August 7, with an average daily incident shortwave energy per square meter below 5.3 kWh. The darkest day of the year is June 22, with an average of 4.4 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Antofagasta are -23.652 deg latitude, -70.395 deg longitude, and 171 ft elevation.
The topography within 2 miles of Antofagasta contains very significant variations in elevation, with a maximum elevation change of 1,611 feet and an average elevation above sea level of 400 feet. Within 10 miles contains very significant variations in elevation (3,750 feet). Within 50 miles also contains extreme variations in elevation (8,625 feet).
The area within 2 miles of Antofagasta is covered by water (27%), grassland (25%), trees (24%), and shrubs (13%), within 10 miles by water (42%) and bare soil (32%), and within 50 miles by bare soil (49%) and water (42%).
This report illustrates the typical weather in Antofagasta, 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 is only a single weather station, Aeropuerto Cerro Moreno, in our network suitable to be used as a proxy for the historical temperature and dew point records of Antofagasta.
At a distance of 24 kilometers from Antofagasta, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Antofagasta according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . 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.
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 aiports 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.