Climate - Trelew (Argentina)

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Trelew's climate is temperate arid, with quite mild winters (during which it can get cold at night) and hot summers (but with generally cool nights). The wind blows frequently.
The city is located in south-central Argentina, in Patagonia, at 43 degrees south latitude, on the banks of the Chubut River, and about 20 km (12 mi) away from the coast. In the latter, Playa Union is located, while a short distance away is the city of Rawson.
Even though it is located near the coast, the city is exposed both to outbreaks of cold air of Antarctic origin and to invasions of hot air of tropical origin, therefore it is subject to sudden changes in temperature.
Since winter is quite dry, snowfalls are rare and not abundant. Furthermore, since the city is located on the coast, cold air does not settle easily on the ground, and the temperature always exceeds freezing during the day.
In summer, it can sometimes get cold at night, while in other circumstances there can be heat waves. In any case, the wind blows frequently even in this season, moreover, the sea is cold.
About 85 km (52 mi) south of Trelew is Punta Tombo, a small peninsula that is home to the largest penguin colony in Argentina.

Trelew - Climate data

The average temperature of the coldest month (July) is of 6.4 °C (43.5 °F), that of the warmest month (January) is of 22.1 °C (71.8 °F). Here are the average temperatures.
Precipitation amounts to 220 millimeters (8.7 inches) per year: it is therefore scarce. It ranges from 14 mm (0.6 in) in the driest months (January, August, November, December) to 25 mm (1 in) in the wettest ones (March, April, May) Here is the average precipitation.
The sea temperature ranges from 9.5 °C (49 °F) in August, September to 17.5 °C (64 °F) in February. Here are the average sea temperatures.
On average, there are around 2660 sunshine hours per year. Here are the average sunshine hours per day.

Trelew - Weather by month

Based on the period 1991-2020

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In January, the warmest month of the year, the weather in Trelew is usually warm. However, there are remarkable differences between night and day. The average temperature is of 22.1 °C (72 °F), with a minimum of 13.8 °C (56.9 °F) and a maximum of 30.4 °C (86.7 °F).
On the coldest nights of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 3.4 °C (38.1 °F) in January 2005.
On the warmest days of the month, the temperature usually reaches around 37.5 °C (100 °F). However, it reached 41.2 °C (106.2 °F) in January 2014.
Precipitation amounts to 14 mm (0.6 in), distributed over 4 days.
The day lasts on average 14 hours and 55 minutes.
There are on average 10 sunshine hours per day. So, the sun shines 67% of the time.
The average humidity is 39%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 17 °C (62.5 °F). Therefore, the sea is cold for swimming.

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In February, the weather in Trelew is usually warm. However, there are remarkable differences between night and day. The average temperature is of 20.9 °C (70 °F), with a minimum of 12.7 °C (54.9 °F) and a maximum of 29.1 °C (84.4 °F).
On the coldest nights of the month, the temperature usually drops to around 5.5 °C (42 °F). However, it dropped to 1.5 °C (34.7 °F) in February 1993.
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F). However, it reached 41 °C (105.8 °F) in February 2019.
Precipitation amounts to 20 mm (0.8 in), distributed over 4 days.
The day lasts on average 13 hours and 40 minutes.
There are on average 9.5 sunshine hours per day. So, the sun shines 71% of the time.
The average humidity is 46%.
The average wind speed is 23 kph (14 mph).
The average sea temperature is of 17.5 °C (63 °F). Therefore, the sea is cold for swimming.

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In March, the weather in Trelew is usually warm. However, there are remarkable differences between night and day. The average temperature is of 18.7 °C (66 °F), with a minimum of 10.8 °C (51.5 °F) and a maximum of 26.6 °C (79.9 °F).
On the coldest nights of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to 0 °C (32 °F) in March 1998.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 39.4 °C (102.9 °F) in March 2003.
Precipitation amounts to 25 mm (1 in), distributed over 5 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 8.5 sunshine hours per day. So, the sun shines 68% of the time.
The average humidity is 49%.
The average wind speed is 20 kph (13 mph).
The average sea temperature is of 17 °C (62 °F). Therefore, the sea is cold for swimming.

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In April, the weather in Trelew is usually mild. However, there are remarkable differences between night and day. The average temperature is of 14.3 °C (58 °F), with a minimum of 6.6 °C (43.9 °F) and a maximum of 22 °C (71.6 °F).
On the coldest nights of the month, the temperature usually drops to around -0.5 °C (31 °F). However, it dropped to -3.8 °C (25.2 °F) in April 1996.
On the warmest days of the month, the temperature usually reaches around 30 °C (86 °F). However, it reached 35.2 °C (95.4 °F) in April 1998.
Precipitation amounts to 25 mm (1 in), distributed over 5 days.
The day lasts on average 10 hours and 50 minutes.
There are on average 6.5 sunshine hours per day. So, the sun shines 61% of the time.
The average humidity is 53%.
The average wind speed is 18 kph (11 mph).
The average sea temperature is of 15 °C (59 °F). Therefore, the sea is cold for swimming.

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In May, the weather in Trelew is usually mild. However, there are remarkable differences between night and day. The average temperature is of 10.1 °C (50 °F), with a minimum of 3.1 °C (37.5 °F) and a maximum of 17.2 °C (62.9 °F).
On the coldest nights of the month, the temperature usually drops to around -4 °C (25 °F). However, it dropped to -8.5 °C (16.7 °F) in May 1993.
On the warmest days of the month, the temperature usually reaches around 25 °C (76.5 °F). However, it reached 31 °C (87.8 °F) in May 2010.
Precipitation amounts to 25 mm (1 in), distributed over 7 days.
The day lasts on average 9 hours and 35 minutes.
There are on average 5 sunshine hours per day. So, the sun shines 52% of the time.
The average humidity is 62%.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 13 °C (55.5 °F). Therefore, the sea is very cold for swimming.

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In June, the weather in Trelew is usually quite mild. The average temperature is of 7.0 °C (45 °F), with a minimum of 0.5 °C (32.8 °F) and a maximum of 13.5 °C (56.2 °F).
On the coldest nights of the month, the temperature usually drops to around -6 °C (21 °F). However, it dropped to -12.3 °C (9.9 °F) in June 2002.
On the warmest days of the month, the temperature usually reaches around 20.5 °C (68.5 °F). However, it reached 26.8 °C (80.2 °F) in June 1996.
Precipitation amounts to 20 mm (0.8 in), distributed over 8 days.
The day lasts on average 9 hours and 0 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 4.5 sunshine hours per day. So, the sun shines 50% of the time.
The average humidity is 65%.
The average wind speed is 16 kph (10 mph).
The average sea temperature is of 11.5 °C (52.5 °F). Therefore, the sea is very cold for swimming.

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In July, the coldest month of the year, the weather in Trelew is usually quite cold. However, there are remarkable differences between night and day. The average temperature is of 6.4 °C (44 °F), with a minimum of -0.4 °C (31.4 °F) and a maximum of 13.2 °C (55.7 °F).
On the coldest nights of the month, the temperature usually drops to around -7 °C (19.5 °F). However, it dropped to -11.4 °C (11.5 °F) in July 1995.
On the warmest days of the month, the temperature usually reaches around 20 °C (68 °F). However, it reached 25 °C (77 °F) in July 1998.
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
The day lasts on average 9 hours and 25 minutes.
There are on average 4.5 sunshine hours per day. So, the sun shines 47% of the time.
The average humidity is 63%.
The average wind speed is 17 kph (11 mph).
The average sea temperature is of 10 °C (50 °F). Therefore, the sea is very cold for swimming.

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In August, the weather in Trelew is usually mild. However, there are remarkable differences between night and day. The average temperature is of 8.7 °C (48 °F), with a minimum of 1.4 °C (34.5 °F) and a maximum of 16 °C (60.7 °F).
On the coldest nights of the month, the temperature usually drops to around -5 °C (22.5 °F). However, it dropped to -10.6 °C (12.9 °F) in August 1997.
On the warmest days of the month, the temperature usually reaches around 23 °C (73 °F). However, it reached 25.8 °C (78.4 °F) in August 2001.
Precipitation amounts to 14 mm (0.6 in), distributed over 6 days.
The day lasts on average 10 hours and 30 minutes.
There are on average 5.5 sunshine hours per day. So, the sun shines 53% of the time.
The average humidity is 55%.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 9.5 °C (48.5 °F). Therefore, the sea is very cold for swimming.

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In September, the weather in Trelew is usually mild. However, there are remarkable differences between night and day. The average temperature is of 11.1 °C (52 °F), with a minimum of 3.7 °C (38.7 °F) and a maximum of 18.5 °C (65.3 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -7 °C (19.4 °F) in September 2001.
On the warmest days of the month, the temperature usually reaches around 26.5 °C (80 °F). However, it reached 33 °C (91.4 °F) in September 1996.
Precipitation amounts to 15 mm (0.6 in), distributed over 6 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 6.5 sunshine hours per day. So, the sun shines 55% of the time.
The average humidity is 52%.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 9.5 °C (49 °F). Therefore, the sea is very cold for swimming.

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In October, the weather in Trelew is usually mild. However, there are remarkable differences between night and day. The average temperature is of 14.5 °C (58 °F), with a minimum of 6.8 °C (44.2 °F) and a maximum of 22.3 °C (72.1 °F).
On the coldest nights of the month, the temperature usually drops to around -1 °C (30 °F). However, it dropped to -5 °C (23 °F) in October 1999.
On the warmest days of the month, the temperature usually reaches around 30.5 °C (87 °F). However, it reached 35 °C (95 °F) in October 2007.
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
The day lasts on average 13 hours and 25 minutes.
There are on average 8 sunshine hours per day. So, the sun shines 59% of the time.
The average humidity is 46%.
The average wind speed is 22 kph (14 mph).
The average sea temperature is of 10.5 °C (51.5 °F). Therefore, the sea is very cold for swimming.

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In November, the weather in Trelew is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 17.7 °C (64 °F), with a minimum of 9.7 °C (49.4 °F) and a maximum of 25.8 °C (78.4 °F).
On the coldest nights of the month, the temperature usually drops to around 2.5 °C (36.5 °F). However, it dropped to -2 °C (28.4 °F) in November 2014.
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 37.5 °C (99.5 °F) in November 1996.
Precipitation amounts to 14 mm (0.6 in), distributed over 5 days.
The day lasts on average 14 hours and 40 minutes.
There are on average 9.5 sunshine hours per day. So, the sun shines 65% of the time.
The average humidity is 41%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 12.5 °C (54.5 °F). Therefore, the sea is very cold for swimming.

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In December, the weather in Trelew is usually warm. However, there are remarkable differences between night and day. The average temperature is of 20.4 °C (69 °F), with a minimum of 12.2 °C (53.9 °F) and a maximum of 28.6 °C (83.5 °F).
On the coldest nights of the month, the temperature usually drops to around 5 °C (40.5 °F). However, it dropped to 0.5 °C (32.9 °F) in December 2001.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (96 °F). However, it reached 39 °C (102.2 °F) in December 1995.
Precipitation amounts to 14 mm (0.6 in), distributed over 4 days.
The day lasts on average 15 hours and 20 minutes. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 9.5 sunshine hours per day. So, the sun shines 62% of the time.
The average humidity is 39%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 15 °C (59 °F). Therefore, the sea is cold for swimming.