Climate and Average Weather Year Round in Ushuaia Argentina

In Ushuaia, the summers are mostly cloudy and cold; the winters are snowy, very cold, and partly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 30°F to 55°F and is rarely below 23°F or above 63°F.

Based on the tourism score, the best time of year to visit Ushuaia for warm-weather activities is from early January to mid February.

The warm season lasts for 3.8 months, from November 25 to March 19, with an average daily high temperature above 52°F. The hottest month of the year in Ushuaia is January, with an average high of 55°F and low of 43°F.

The cold season lasts for 3.0 months, from May 23 to August 23, with an average daily high temperature below 41°F. The coldest month of the year in Ushuaia is July, with an average low of 31°F and high of 39°F.

The clearest month of the year in Ushuaia is December, during which on average the sky is clear, mostly clear, or partly cloudy 44% of the time.

The cloudiest month of the year in Ushuaia is June, during which on average the sky is overcast or mostly cloudy 64% of the time.

© OpenStreetMap contributors

Compare Ushuaia to:

CompareMap

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

The wetter season lasts 6.5 months, from November 10 to May 24, with a greater than 22% chance of a given day being a wet day. The month with the most wet days in Ushuaia is January, with an average of 8.8 days with at least 0.04 inches of precipitation.

The drier season lasts 5.5 months, from May 24 to November 10. The month with the fewest wet days in Ushuaia is September, with an average of 4.3 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Ushuaia is January, with an average of 8.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 30% on December 26.

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. Ushuaia experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Ushuaia. The month with the most rain in Ushuaia is January, with an average rainfall of 1.5 inches.

The month with the least rain in Ushuaia is September, with an average rainfall of 0.5 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Ushuaia experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 2.5 months, from May 28 to August 12, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Ushuaia is June, with an average snowfall of 1.6 inches.

The snowless period of the year lasts for 9.5 months, from August 12 to May 28. The least snow falls around February 1, with an average total accumulation of 0.0 inches.

The length of the day in Ushuaia varies extremely over the course of the year. In 2026, the shortest day is June 21, with 7 hours, 12 minutes of daylight; the longest day is December 21, with 17 hours, 20 minutes of daylight.

The earliest sunrise is at 4:49 AM on December 15, and the latest sunrise is 5 hours, 9 minutes later at 9:59 AM on June 25. The earliest sunset is at 5:10 PM on June 17, and the latest sunset is 5 hours, 2 minutes later at 10:13 PM on December 28.

Daylight saving time (DST) is not observed in Ushuaia during 2026.

The figure below presents a compact representation of key lunar data for 2026. 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.

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 Ushuaia, 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.

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 Ushuaia experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.5 months, from August 5 to March 23, with average wind speeds of more than 13.9 miles per hour. The windiest month of the year in Ushuaia is November, with an average hourly wind speed of 15.8 miles per hour.

The calmer time of year lasts for 4.5 months, from March 23 to August 5. The calmest month of the year in Ushuaia is May, with an average hourly wind speed of 12.2 miles per hour.

The predominant average hourly wind direction in Ushuaia is from the west throughout the year.

Ushuaia 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 3.2 months, from December 30 to April 7, with an average temperature above 48°F. The month of the year in Ushuaia with the warmest water is February, with an average temperature of 49°F.

The time of year with cooler water lasts for 3.9 months, from June 23 to October 20, with an average temperature below 43°F. The month of the year in Ushuaia with the coolest water is August, with an average temperature of 42°F.

To characterize how pleasant the weather is in Ushuaia 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 Ushuaia for general outdoor tourist activities is from early January to mid February, with a peak score in the second week of January.

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 Ushuaia for hot-weather activities is from late January to early February.

Methodology

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).

The growing season in Ushuaia typically lasts for 5.1 months (153 days), from around November 5 to around April 7, rarely starting before October 5 or after December 1, and rarely ending before March 9 or after May 4.

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.

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 3.0 months, from November 6 to February 7, with an average daily incident shortwave energy per square meter above 4.9 kWh. The brightest month of the year in Ushuaia is December, with an average of 5.9 kWh.

The darker period of the year lasts for 4.3 months, from April 16 to August 26, with an average daily incident shortwave energy per square meter below 1.5 kWh. The darkest month of the year in Ushuaia is June, with an average of 0.5 kWh.

For the purposes of this report, the geographical coordinates of Ushuaia are -54.800 deg latitude, -68.300 deg longitude, and 171 ft elevation.

The topography within 2 miles of Ushuaia contains large variations in elevation, with a maximum elevation change of 1,985 feet and an average elevation above sea level of 386 feet. Within 10 miles contains large variations in elevation (4,744 feet). Within 50 miles also contains extreme variations in elevation (7,474 feet).

The area within 2 miles of Ushuaia is covered by water (43%), trees (38%), and shrubs (15%), within 10 miles by water (39%) and trees (24%), and within 50 miles by water (32%) and trees (30%).