Summer Weather in La Serena Chile

Daily high temperatures are around 68°F, rarely falling below 63°F or exceeding 73°F. The highest daily average high temperature is 70°F on February 7.

Daily low temperatures are around 57°F, rarely falling below 52°F or exceeding 62°F. The highest daily average low temperature is 59°F on February 5.

For reference, on February 5, the hottest day of the year, temperatures in La Serena typically range from 59°F to 70°F, while on July 15, the coldest day of the year, they range from 47°F to 61°F.

The figure below shows you a compact characterization of the hourly average summer temperatures. 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.

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The summer in La Serena experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 12% to 7%. The lowest chance of overcast or mostly cloudy conditions is 6% on January 31.

The clearest day of the summer is January 31, with clear, mostly clear, or partly cloudy conditions 94% of the time.

For reference, on May 31, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 44%, while on January 31, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 94%.

Over the course of the summer in La Serena, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 13 minutes, implying an average daily decrease of 49 seconds, and weekly decrease of 5 minutes, 43 seconds.

The shortest day of the summer is February 28, with 12 hours, 43 minutes of daylight and the longest day is December 21, with 14 hours, 4 minutes of daylight.

The earliest sunrise of the summer in La Serena is 6:36 AM on December 2 and the latest sunrise is 59 minutes later at 7:35 AM on February 28.

The latest sunset is 8:50 PM on January 9 and the earliest sunset is 31 minutes earlier at 8:18 PM on February 28.

Daylight saving time is observed in La Serena during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on December 21, the longest day of the year, the Sun rises at 6:41 AM and sets 14 hours, 4 minutes later, at 8:45 PM, while on June 20, the shortest day of the year, it rises at 7:40 AM and sets 10 hours, 13 minutes later, at 5:53 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the summer of 2024. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy in La Serena is essentially constant during the summer, remaining around 0% throughout.

For reference, on January 28, the muggiest day of the year, there are muggy conditions 0% of the time, while on May 31, the least muggy day of the year, there are muggy conditions 0% of the time.

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 La Serena is gradually decreasing during the summer, decreasing from 7.9 miles per hour to 7.2 miles per hour over the course of the season.

For reference, on December 7, the windiest day of the year, the daily average wind speed is 8.0 miles per hour, while on May 17, the calmest day of the year, the daily average wind speed is 5.5 miles per hour.

The highest daily average wind speed during the summer is 8.0 miles per hour on December 7.

The hourly average wind direction in La Serena throughout the summer is predominantly from the west, with a peak proportion of 57% on January 7.

La Serena 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 La Serena is increasing during the summer, rising by 5°F, from 59°F to 64°F, over the course of the season.

The highest average surface water temperature during the summer is 64°F on February 10.

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 La Serena 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.

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.

The average accumulated growing degree days in La Serena are very rapidly increasing during the summer, increasing by 1,128°F, from 935°F to 2,063°F, over the course of the season.

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 in La Serena is decreasing during the summer, falling by 1.4 kWh, from 9.0 kWh to 7.6 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 9.1 kWh on December 18.

For the purposes of this report, the geographical coordinates of La Serena are -29.905 deg latitude, -71.249 deg longitude, and 98 ft elevation.

The topography within 2 miles of La Serena contains only modest variations in elevation, with a maximum elevation change of 443 feet and an average elevation above sea level of 128 feet. Within 10 miles contains only modest variations in elevation (3,346 feet). Within 50 miles also contains extreme variations in elevation (13,947 feet).

The area within 2 miles of La Serena is covered by shrubs (58%), trees (16%), and grassland (14%), within 10 miles by water (30%) and shrubs (22%), and within 50 miles by water (38%) and sparse vegetation (15%).