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Average Weather in Calama Chile

In Calama, the summers are long, warm, and arid; the winters are short, cool, and dry; and it is mostly clear year round. Over the course of the year, the temperature typically varies from 41°F to 80°F and is rarely below 36°F or above 84°F.

The warm season lasts for 5.6 months, from October 16 to April 4, with an average daily high temperature above 78°F. The hottest day of the year is December 12, with an average high of 80°F and low of 51°F.

The cool season lasts for 2.4 months, from May 27 to August 7, with an average daily high temperature below 72°F. The coldest day of the year is July 18, with an average low of 41°F and high of 70°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in Calama12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillycoldcoolcomfortablewarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

In Calama, 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 Calama begins around April 20 and lasts for 7.0 months, ending around November 21. On August 30, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 86% of the time, and overcast or mostly cloudy 14% of the time.

The cloudier part of the year begins around November 21 and lasts for 5.0 months, ending around April 20. On January 7, the cloudiest day of the year, the sky is overcast or mostly cloudy 38% of the time, and clear, mostly clear, or partly cloudy 62% of the time.

Cloud Cover

Cloud Cover in Calamaclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 738%Jan 738%Aug 3014%Aug 3014%Apr 2026%Apr 2026%Nov 2126%Nov 2126%overcastmostly cloudypartly cloudymostly clearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

Calama 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 4%, with an average value of 1%.

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 4% on February 16.

Daily Chance of Precipitation

Daily Chance of Precipitation in Calama0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 164%Feb 164%Jul 310%Jul 310%Jan 12%Jan 12%Mar 192%Mar 192%
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

The sliding 31-day quantity of rainfall in Calama does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Monthly Rainfall

Average Monthly Rainfall in Calama0.0 in0.1 in0.2 in0.3 in0.4 in0.5 inJanFebMarAprMayJunJulAugSepOctNovDecFeb 20.1 inFeb 20.1 inAug 90.0 inAug 90.0 inMay 160.0 inMay 160.0 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Calama varies over the course of the year. In 2017, the shortest day is June 21, with 10 hours, 45 minutes of daylight; the longest day is December 21, with 13 hours, 31 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:42 AM on November 28, and the latest sunrise is 1 hour, 19 minutes later at 8:01 AM on August 13. The earliest sunset is at 5:58 PM on June 6, and the latest sunset is 2 hours, 27 minutes later at 8:25 PM on January 13.

Daylight saving time (DST) is observed in Calama during 2017, starting in the spring on August 13 and ending in the fall on May 13.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in Calama2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecNov 286:42 AMNov 286:42 AM8:25 PMJan 138:25 PMJan 13Jun 65:58 PMJun 65:58 PM8:01 AMAug 138:01 AMAug 13DSTMay 13DSTMay 13Aug 13DSTAug 13DSTdaynightnight
The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 Calama, 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, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Calama0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 30%Jul 30%drydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Calama does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 4.6 miles per hour throughout.

Average Wind Speed

Average Wind Speed in Calama0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mphJanFebMarAprMayJunJulAugSepOctNovDecSep 214.9 mphSep 214.9 mphApr 54.2 mphApr 54.2 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Calama varies throughout the year.

The wind is most often from the north for 1.4 weeks, from July 2 to July 12, with a peak percentage of 34% on July 9. The wind is most often from the west for 12 months, from July 12 to July 2, with a peak percentage of 61% on January 1.

Wind Direction

Wind Direction in CalamaWNW0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

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 4.1 months, from October 12 to February 16, with an average daily incident shortwave energy per square meter above 8.5 kWh. The brightest day of the year is December 7, with an average of 9.4 kWh.

The darker period of the year lasts for 3.0 months, from May 5 to August 5, with an average daily incident shortwave energy per square meter below 5.9 kWh. The darkest day of the year is June 20, with an average of 5.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Calamabrightbrightdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWh11 kWhJanFebMarAprMayJunJulAugSepOctNovDecDec 79.4 kWhDec 79.4 kWhJun 205.0 kWhJun 205.0 kWhOct 128.5 kWhOct 128.5 kWhFeb 168.5 kWhFeb 168.5 kWhMay 55.9 kWhMay 55.9 kWhAug 55.9 kWhAug 55.9 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Calama are -22.457 deg latitude, -68.924 deg longitude, and 7,457 ft elevation.

The topography within 2 miles of Calama contains only modest variations in elevation, with a maximum elevation change of 348 feet and an average elevation above sea level of 7,454 feet. Within 10 miles contains only modest variations in elevation (5,059 feet). Within 50 miles also contains extreme variations in elevation (12,582 feet).

The area within 2 miles of Calama is covered by bare soil (45%) and artificial surfaces (41%), within 10 miles by bare soil (92%), and within 50 miles by bare soil (77%).

Data Sources

This report illustrates the typical weather in Calama, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Calama 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 Calama, 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 Tables of the Sun, Moon and Planets , 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 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.