Climate in Ushuaia (Argentina)

Ushuaia's climate is cold oceanic (according to Köppen, subpolar oceanic climate - Cfc), with cold winters (from June to August) and very cool summers (from December to February).
The city is located in the far south of Argentina, at 54 degrees south latitude, in Patagonia, on the coast of the Isla Grande (Big Island) of Tierra del Fuego (half of which belongs to Chile), in an inland bay, the Beagle Channel, which resembles a fjord.
The climate is windy and unstable. The rains are frequent all year round, although they are not abundant.
Snowfalls generally occur from April to November, however, if we exclude some very cold periods from June to August, the temperature generally exceeds freezing during the day, so the snow, even if it had accumulated, melts quite soon.
However, at night it can get cold even in summer.
The nearby mountains are covered with snow from 500/600 meters (1,650/2,000 feet).

Best Time

---

The best time to visit Ushuaia is summer, from December to February, as it is the mildest of the year. Also, it is easier to hike to nearby glaciers such as the Glaciar Martial because there is little snow.
Instead, at Cerro Castor, the southernmost ski center in the world, you can ski in winter and early spring, and in particular from late June to late September.

Ushuaia - Climate data

The average temperature of the coldest month (June) is of 2.3 °C (36.1 °F), that of the warmest month (January) is of 10.3 °C (50.5 °F). Here are the average temperatures.
Precipitation amounts to 460 millimeters (18.1 inches) per year: it is therefore quite scarce. It ranges from 28 mm (1.1 in) in the driest month (October) to 47 mm (1.9 in) in the wettest one (April). Here is the average precipitation.
The sea temperature ranges from 5.5 °C (42 °F) in August, September to 9 °C (48 °F) in February, March. Here are the average sea temperatures.
There are on average around 1410 sunshine hours per year. Here are the average hours of sunshine per day.

Ushuaia - Weather by month

Based on the period 1991-2020

---

January, the warmest month of the year, is generally a mild month. The average temperature is of 10.3 °C (51 °F), with a minimum of 6.1 °C (43 °F) and a maximum of 14.4 °C (58 °F).
On the coldest nights of the month, the temperature usually drops to around 2 °C (36 °F). However, it dropped to -1 °C (30.2 °F) in January 1997.
On the warmest days of the month, the temperature usually reaches around 21.5 °C (71 °F). However, it reached 27 °C (80.6 °F) in January 2008.
Precipitation amounts to 45 mm (1.8 in), distributed over 9 days.
The day lasts on average 16 hours and 30 minutes. So the days are long.
There are on average 5.5 hours of sunshine per day. So, the sun shines 32% of the time.
The average humidity is 69%.
The average wind speed is 25 kph (16 mph).
The average sea temperature is of 8.5 °C (47.5 °F). Therefore, the sea is very cold for swimming.

---

February is generally a mild month. The average temperature is of 10.2 °C (50 °F), with a minimum of 6 °C (42.7 °F) and a maximum of 14.4 °C (57.9 °F).
On the coldest nights of the month, the temperature usually drops to around 2 °C (35.5 °F). However, it dropped to -2.3 °C (27.9 °F) in February 1996.
On the warmest days of the month, the temperature usually reaches around 22 °C (71.5 °F). However, it reached 27.5 °C (81.5 °F) in February 2004.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 14 hours and 35 minutes. So the days are long.
There are on average 5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 9 °C (48 °F). Therefore, the sea is very cold for swimming.

---

March is generally a mild month. The average temperature is of 9.0 °C (48 °F), with a minimum of 5 °C (41.1 °F) and a maximum of 13 °C (55.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1 °C (33.5 °F). However, it dropped to -3.8 °C (25.2 °F) in March 1992.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 20 °C (67.5 °F). However, it reached 25 °C (77 °F) in March 2005.
Precipitation amounts to 38 mm (1.5 in), distributed over 8 days.
The day lasts on average 12 hours and 25 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 9 °C (48 °F). Therefore, the sea is very cold for swimming.

---

April is generally a quite mild month. The average temperature is of 6.6 °C (44 °F), with a minimum of 3.1 °C (37.6 °F) and a maximum of 10 °C (50 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -1 °C (30.5 °F). However, it dropped to -4.5 °C (23.9 °F) in April 2016.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 16 °C (61 °F). However, it reached 21.6 °C (70.9 °F) in April 2013.
Precipitation amounts to 47 mm (1.9 in), distributed over 9 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 31% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 8 °C (47 °F). Therefore, the sea is very cold for swimming.

---

May is generally a quite cold month. The average temperature is of 4.6 °C (40 °F), with a minimum of 1.7 °C (35 °F) and a maximum of 7.5 °C (45.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -2.5 °C (27 °F). However, it dropped to -7.7 °C (18.1 °F) in May 1991.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 13.5 °C (56.5 °F). However, it reached 17.5 °C (63.5 °F) in May 1995.
Precipitation amounts to 35 mm (1.4 in), distributed over 8 days.
The day lasts on average 8 hours and 20 minutes.
There are on average 2.5 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 7.5 °C (45.5 °F). Therefore, the sea is very cold for swimming.

---

June, the coldest month of the year, is generally a cold month. The average temperature is of 2.3 °C (36 °F), with a minimum of -0.3 °C (31.4 °F) and a maximum of 4.8 °C (40.7 °F).
On the coldest nights, the temperature usually drops to around -5 °C (23 °F). However, it dropped to -13.8 °C (7.2 °F) in June 1992.
On the warmest days, the temperature usually reaches around 10.5 °C (51 °F). However, it reached 15.6 °C (60.1 °F) in June 2013.
Precipitation amounts to 42 mm (1.7 in), distributed over 9 days.
The day lasts on average 7 hours and 20 minutes. So the days are short. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 1.5 hours of sunshine per day. So, the sun shines 21% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 7 °C (44 °F). Therefore, the sea is very cold for swimming.

---

July is generally a cold month. The average temperature is of 2.3 °C (36 °F), with a minimum of -0.5 °C (31.1 °F) and a maximum of 5 °C (41.1 °F).
On the coldest nights of the month, the temperature usually drops to around -5 °C (23.5 °F). However, it dropped to -12.8 °C (9 °F) in July 1992.
On the warmest days of the month, the temperature usually reaches around 10.5 °C (50.5 °F). However, it reached 17 °C (62.6 °F) in July 2010.
Precipitation amounts to 36 mm (1.4 in), distributed over 8 days.
The day lasts on average 7 hours and 55 minutes. So the days are short.
There are on average 2 hours of sunshine per day. So, the sun shines 24% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 6 °C (43 °F). Therefore, the sea is very cold for swimming.

---

August is generally a cold month. The average temperature is of 3.1 °C (38 °F), with a minimum of 0.1 °C (32.1 °F) and a maximum of 6.2 °C (43.2 °F).
On the coldest nights of the month, the temperature usually drops to around -4 °C (25 °F). However, it dropped to -11 °C (12.2 °F) in August 1991.
On the warmest days of the month, the temperature usually reaches around 11 °C (52 °F). However, it reached 17.1 °C (62.8 °F) in August 2003.
Precipitation amounts to 38 mm (1.5 in), distributed over 9 days.
The day lasts on average 9 hours and 35 minutes.
There are on average 3 hours of sunshine per day. So, the sun shines 32% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 5.5 °C (42.5 °F). Therefore, the sea is very cold for swimming.

---

September is generally a quite cold month. The average temperature is of 4.8 °C (41 °F), with a minimum of 1.2 °C (34.1 °F) and a maximum of 8.5 °C (47.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -3 °C (26.5 °F). However, it dropped to -6.5 °C (20.3 °F) in September 2000.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 14 °C (57 °F). However, it reached 19.8 °C (67.6 °F) in September 1996.
Precipitation amounts to 30 mm (1.2 in), distributed over 7 days.
The day lasts on average 11 hours and 50 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 5.5 °C (42 °F). Therefore, the sea is very cold for swimming.

---

October is generally a quite mild month. The average temperature is of 6.8 °C (44 °F), with a minimum of 2.6 °C (36.8 °F) and a maximum of 11 °C (51.7 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -2 °C (29 °F). However, it dropped to -5 °C (23 °F) in October 2013.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 16.5 °C (62 °F). However, it reached 23.7 °C (74.7 °F) in October 2015.
Precipitation amounts to 28 mm (1.1 in), distributed over 7 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 68%.
The average wind speed is 22 kph (14 mph).
The average sea temperature is of 6 °C (43 °F). Therefore, the sea is very cold for swimming.

---

November is generally a quite mild month. The average temperature is of 8.2 °C (47 °F), with a minimum of 3.8 °C (38.8 °F) and a maximum of 12.5 °C (54.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around -0.5 °C (31 °F). However, it dropped to -3 °C (26.6 °F) in November 2002.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 19 °C (66 °F). However, it reached 26.3 °C (79.3 °F) in November 1992.
Precipitation amounts to 39 mm (1.5 in), distributed over 9 days.
The day lasts on average 16 hours and 5 minutes. So the days are long.
There are on average 5.5 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 68%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 6.5 °C (44 °F). Therefore, the sea is very cold for swimming.

---

December is generally a mild month. The average temperature is of 9.4 °C (49 °F), with a minimum of 5.1 °C (41.3 °F) and a maximum of 13.6 °C (56.4 °F).
On the coldest nights of the month, the temperature usually drops to around 1 °C (34 °F). However, it dropped to -1 °C (30.2 °F) in December 2005.
On the warmest days of the month, the temperature usually reaches around 20 °C (67.5 °F). However, it reached 25.3 °C (77.5 °F) in December 1995.
Precipitation amounts to 43 mm (1.7 in), distributed over 9 days.
The day lasts on average 17 hours and 10 minutes. So the days are very long. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 5 hours of sunshine per day. So, the sun shines 29% of the time.
The average humidity is 69%.
The average wind speed is 25 kph (15 mph).
The average sea temperature is of 7.5 °C (46 °F). Therefore, the sea is very cold for swimming.