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Average Weather in Santiago Chile

In Santiago, the summers are long, warm, arid, and clear and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 38°F to 86°F and is rarely below 30°F or above 91°F.

The hot season lasts for 4.0 months, from November 24 to March 23, with an average daily high temperature above 81°F. The hottest day of the year is January 16, with an average high of 86°F and low of 57°F.

The cool season lasts for 3.3 months, from May 21 to September 1, with an average daily high temperature below 65°F. The coldest day of the year is July 25, with an average low of 38°F and high of 60°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 Santiago12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillycoldcoolcomfortablewarmhot
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 Santiago, 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 Santiago begins around October 18 and lasts for 6.1 months, ending around April 20. On January 31, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 91% of the time, and overcast or mostly cloudy 9% of the time.

The cloudier part of the year begins around April 20 and lasts for 5.9 months, ending around October 18. On June 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% of the time.

Cloud Cover

Cloud Cover in Santiagoclearerclearercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 153%Jun 153%Jan 319%Jan 319%Oct 1831%Oct 1831%Apr 2031%Apr 2031%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

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Santiago varies throughout the year.

The wetter season lasts 4.2 months, from May 3 to September 8, with a greater than 11% chance of a given day being a wet day. The chance of a wet day peaks at 20% on June 27.

The drier season lasts 7.8 months, from September 8 to May 3. The smallest chance of a wet day is 2% on December 2.

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 20% on June 27.

Daily Chance of Precipitation

Daily Chance of Precipitation in Santiagowetdrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 2720%Jun 2720%Dec 22%Dec 22%May 311%May 311%Sep 811%Sep 811%rainmixed
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

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. Santiago experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 5.6 months, from April 11 to September 30, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 13, with an average total accumulation of 2.4 inches.

The rainless period of the year lasts for 6.4 months, from September 30 to April 11. The least rain falls around December 14, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall

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 Santiago varies significantly over the course of the year. In 2017, the shortest day is June 21, with 9 hours, 56 minutes of daylight; the longest day is December 21, with 14 hours, 23 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 6:25 AM on December 4, and the latest sunrise is 2 hours, 0 minutes later at 8:25 AM on May 13. The earliest sunset is at 5:41 PM on June 11, and the latest sunset is 3 hours, 15 minutes later at 8:56 PM on January 7.

Daylight saving time (DST) is observed in Santiago 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 Santiago2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecDec 46:25 AMDec 46:25 AM8:56 PMJan 78:56 PMJan 7Jun 115:41 PMJun 115:41 PM8:25 AMMay 138:25 AMMay 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 Santiago, 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 Santiago0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 140%Jul 140%Dec 250%Dec 250%humidhumiddrydry
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 Santiago does not vary significantly over the course of the year, remaining within 0.4 miles per hour of 3.4 miles per hour throughout.

Average Wind Speed

Average Wind Speed in Santiago0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mphJanFebMarAprMayJunJulAugSepOctNovDecJan 43.8 mphJan 43.8 mphMay 93.0 mphMay 93.0 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 Santiago varies throughout the year.

The wind is most often from the east for 9.0 months, from February 18 to November 18, with a peak percentage of 64% on July 7. The wind is most often from the west for 3.0 months, from November 18 to February 18, with a peak percentage of 48% on January 1.

Wind Direction

Wind Direction in SantiagoWEW0%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).

Water Temperature

Santiago 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 2.9 months, from January 1 to March 29, with an average temperature above 60°F. The day of the year with the warmest water is February 10, with an average temperature of 62°F.

The time of year with cooler water lasts for 4.5 months, from June 16 to November 1, with an average temperature below 56°F. The day of the year with the coolest water is August 6, with an average temperature of 54°F.

Average Water Temperature

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.6 months, from November 2 to February 19, with an average daily incident shortwave energy per square meter above 8.1 kWh. The brightest day of the year is December 28, with an average of 9.5 kWh.

The darker period of the year lasts for 3.6 months, from April 30 to August 17, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is June 23, with an average of 2.7 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Santiagobrightbrightdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWh11 kWhJanFebMarAprMayJunJulAugSepOctNovDecDec 289.5 kWhDec 289.5 kWhJun 232.7 kWhJun 232.7 kWhNov 28.1 kWhNov 28.1 kWhFeb 198.1 kWhFeb 198.1 kWhApr 304.1 kWhApr 304.1 kWhAug 174.1 kWhAug 174.1 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 Santiago are -33.457 deg latitude, -70.648 deg longitude, and 1,811 ft elevation.

The topography within 2 miles of Santiago contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 1,818 feet. Within 10 miles contains only modest variations in elevation (6,207 feet). Within 50 miles also contains extreme variations in elevation (19,902 feet).

The area within 2 miles of Santiago is covered by artificial surfaces (71%), trees (13%), and grassland (11%), within 10 miles by artificial surfaces (34%) and shrubs (28%), and within 50 miles by shrubs (37%) and trees (20%).

Data Sources

This report illustrates the typical weather in Santiago, 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 Santiago.

For each station, the records are corrected for the elevation difference between that station and Santiago 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 Santiago is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Santiago and a given station.

The stations contributing to this reconstruction are: Comodoro Arturo Merino Benítez International Airport (97%, 15 kilometers, northwest) and Curico (2.7%, 176 kilometers, south).

Other Data

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.