Climate - Trelew (Argentina)

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.

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 (9.5 °F) in August, September to 17.5 °C (17.5 °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
(January - February - March - April - May - June - July - August - September - October - November - December)

In January, the warmest month of the year, 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, in January 2005, it dropped to 3.4 °C (38.1 °F).
On the warmest days of the month, the temperature usually reaches around 37.5 °C (100 °F). However, in January 2014, it reached 41.2 °C (106.2 °F).
Precipitation amounts to 14 mm (0.6 in), distributed over 4 days.
On average, there are 310 hours of sunshine per month, i.e. 10 hours per day.
The average humidity is 39%.
The average wind speed is 24 kph (15 kph).
The average sea temperature is of 17 °C (62.5 °F).

In February, 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, in February 1993, it dropped to 1.5 °C (34.7 °F).
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F). However, in February 2019, it reached 41 °C (105.8 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 4 days.
On average, there are 270 hours of sunshine per month, i.e. 9.5 hours per day.
The average humidity is 46%.
The average wind speed is 23 kph (14 kph).
The average sea temperature is of 17.5 °C (63 °F).

In March, 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, in March 1998, it dropped to 0 °C (32 °F).
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, in March 2003, it reached 39.4 °C (102.9 °F).
Precipitation amounts to 25 mm (1 in), distributed over 5 days.
On average, there are 260 hours of sunshine per month, i.e. 8.5 hours per day.
The average humidity is 49%.
The average wind speed is 20 kph (13 kph).
The average sea temperature is of 17 °C (62 °F).

In April, 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, in April 1996, it dropped to -3.8 °C (25.2 °F).
On the warmest days of the month, the temperature usually reaches around 30 °C (86 °F). However, in April 1998, it reached 35.2 °C (95.4 °F).
Precipitation amounts to 25 mm (1 in), distributed over 5 days.
On average, there are 200 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 53%.
The average wind speed is 18 kph (11 kph).
The average sea temperature is of 15 °C (59 °F).

In May, 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, in May 1993, it dropped to -8.5 °C (16.7 °F).
On the warmest days of the month, the temperature usually reaches around 25 °C (76.5 °F). However, in May 2010, it reached 31 °C (87.8 °F).
Precipitation amounts to 25 mm (1 in), distributed over 7 days.
On average, there are 155 hours of sunshine per month, i.e. 5 hours per day.
The average humidity is 62%.
The average wind speed is 16 kph (10 kph).
The average sea temperature is of 13 °C (55.5 °F).

In June, 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, in June 2002, it dropped to -12.3 °C (9.9 °F).
On the warmest days of the month, the temperature usually reaches around 20.5 °C (68.5 °F). However, in June 1996, it reached 26.8 °C (80.2 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 8 days.
On average, there are 135 hours of sunshine per month, i.e. 4.5 hours per day.
The average humidity is 65%.
The average wind speed is 16 kph (10 kph).
The average sea temperature is of 11.5 °C (52.5 °F).

In July, the coldest month of the year, 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, in July 1995, it dropped to -11.4 °C (11.5 °F).
On the warmest days of the month, the temperature usually reaches around 20 °C (68 °F). However, in July 1998, it reached 25 °C (77 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
On average, there are 135 hours of sunshine per month, i.e. 4.5 hours per day.
The average humidity is 63%.
The average wind speed is 17 kph (11 kph).
The average sea temperature is of 10 °C (50 °F).

In August, 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, in August 1997, it dropped to -10.6 °C (12.9 °F).
On the warmest days of the month, the temperature usually reaches around 23 °C (73 °F). However, in August 2001, it reached 25.8 °C (78.4 °F).
Precipitation amounts to 14 mm (0.6 in), distributed over 6 days.
On average, there are 175 hours of sunshine per month, i.e. 5.5 hours per day.
The average humidity is 55%.
The average wind speed is 19 kph (12 kph).
The average sea temperature is of 9.5 °C (48.5 °F).

In September, 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, in September 2001, it dropped to -7 °C (19.4 °F).
On the warmest days of the month, the temperature usually reaches around 26.5 °C (80 °F). However, in September 1996, it reached 33 °C (91.4 °F).
Precipitation amounts to 15 mm (0.6 in), distributed over 6 days.
On average, there are 195 hours of sunshine per month, i.e. 6.5 hours per day.
The average humidity is 52%.
The average wind speed is 20 kph (12 kph).
The average sea temperature is of 9.5 °C (49 °F).

In October, 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, in October 1999, it dropped to -5 °C (23 °F).
On the warmest days of the month, the temperature usually reaches around 30.5 °C (87 °F). However, in October 2007, it reached 35 °C (95 °F).
Precipitation amounts to 20 mm (0.8 in), distributed over 6 days.
On average, there are 245 hours of sunshine per month, i.e. 8 hours per day.
The average humidity is 46%.
The average wind speed is 22 kph (14 kph).
The average sea temperature is of 10.5 °C (51.5 °F).

In November, 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, in November 2014, it dropped to -2 °C (28.4 °F).
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, in November 1996, it reached 37.5 °C (99.5 °F).
Precipitation amounts to 14 mm (0.6 in), distributed over 5 days.
On average, there are 285 hours of sunshine per month, i.e. 9.5 hours per day.
The average humidity is 41%.
The average wind speed is 24 kph (15 kph).
The average sea temperature is of 12.5 °C (54.5 °F).

In December, 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, in December 2001, it dropped to 0.5 °C (32.9 °F).
On the warmest days of the month, the temperature usually reaches around 35.5 °C (96 °F). However, in December 1995, it reached 39 °C (102.2 °F).
Precipitation amounts to 14 mm (0.6 in), distributed over 4 days.
On average, there are 295 hours of sunshine per month, i.e. 9.5 hours per day.
The average humidity is 39%.
The average wind speed is 24 kph (15 kph).
The average sea temperature is of 15 °C (59 °F).