Climate - Bahia Blanca (Argentina)

The climate of Bahía Blanca is temperate oceanic, with mild winters and hot summers. Winter is a fairly dry season, while the wettest period is from October to March. The wind blows frequently.
The city is located in central Argentina, at 39 degrees south latitude, in the southern part of the Pampa, in a bay overlooking the Atlantic Ocean, southwest of Mar del Plata.
Even though it is located near the coast, the city is is subject to sudden changes in temperature, in fact, it is exposed both to outbreaks of cold air of Antarctic origin and to invasions of hot air of tropical origin.
In summer, from December to February, it can sometimes get cold at night, while in other circumstances there can be heat waves. The highest recorded temperature was 44 °C (111 °F), on January 21, 1980. In any case, the wind blows frequently even in this season, moreover, the sea is not warm.
In winter, from June to August, fog can sometimes form. Snow is rare, but at night the temperature can drop below freezing. The lowest recorded temperature was -12 °C (11 °F), on July 4, 1988.

Best Time

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To visit Bahía Blanca you can choose spring and autumn, in October and April, although they are not dry seasons, to avoid both the possible heat of the summer and the possible cold of the winter. However, there are changes in temperature even in these periods.
Summer is the warmest and sunniest season, but it can sometimes get very hot. The sea reaches its highest temperatures from January to March, although it remains cool even in this period.

Bahia Blanca - Climate data

In Bahia Blanca, the average temperature of the coldest month (July) is of 8.3 °C (47.0 °F), that of the warmest month (January) is of 24.3 °C (75.8 °F). Here are the average temperatures.
In Bahia Blanca, precipitation amounts to 650 millimeters (25.6 inches) per year: so, it is at an intermediate level. It ranges from 30 mm (1.2 in) in the driest months (June, July) to 75 mm (3 in) in the wettest ones (March, October) Here is the average precipitation.
At Bahia Blanca, the sea temperature ranges from 11 °C (52 °F) in August to 21 °C (70 °F) in February. Here are the average sea temperatures.
In Bahia Blanca, there are on average around 2315 sunshine hours per year. Here are the average hours of sunshine per day.

Bahia Blanca - Weather by month

Based on the period 1991-2020

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In January, the warmest month of the year, the weather in Bahia Blanca is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 24.3 °C (76 °F), with a minimum of 16.3 °C (61.4 °F) and a maximum of 32.4 °C (90.2 °F).
On the coldest nights of the month, the temperature usually drops to around 8 °C (46 °F). However, it dropped to 3.7 °C (38.7 °F) in January 2015.
On the warmest days of the month, the temperature usually reaches around 38 °C (101 °F). However, it reached 41.4 °C (106.5 °F) in January 2006.
Precipitation amounts to 65 mm (2.6 in), distributed over 8 days.
The day lasts on average 14 hours and 30 minutes. So the days are long.
There are on average 9.5 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 50%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 20.5 °C (68.5 °F). Therefore, the sea is cool for swimming.

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In February, the weather in Bahia Blanca is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 22.9 °C (73 °F), with a minimum of 15.2 °C (59.4 °F) and a maximum of 30.7 °C (87.2 °F).
On the coldest nights of the month, the temperature usually drops to around 7 °C (44.5 °F). However, it dropped to 2.5 °C (36.5 °F) in February 2019.
On the warmest days of the month, the temperature usually reaches around 37 °C (99 °F). However, it reached 40.6 °C (105.1 °F) in February 2006.
Precipitation amounts to 65 mm (2.6 in), distributed over 6 days.
The day lasts on average 13 hours and 30 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 56%.
The average wind speed is 22 kph (14 mph).
The average sea temperature is of 21 °C (70 °F). Therefore, the sea is cool for swimming.

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In March, the weather in Bahia Blanca is usually warm. However, there are remarkable differences between night and day. The average temperature is of 20.7 °C (69 °F), with a minimum of 13.3 °C (55.9 °F) and a maximum of 28.1 °C (82.5 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5 °C (41 °F). However, it dropped to 0.8 °C (33.4 °F) in March 2008.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 35 °C (94.5 °F). However, it reached 39 °C (102.2 °F) in March 2003.
Precipitation amounts to 75 mm (3 in), distributed over 8 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 51% of the time.
The average humidity is 61%.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 20.5 °C (69 °F). Therefore, the sea is cool for swimming.

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In April, the weather in Bahia Blanca is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 16.0 °C (61 °F), with a minimum of 9.2 °C (48.5 °F) and a maximum of 22.9 °C (73.3 °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 -2.6 °C (27.3 °F) in April 2010.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29.5 °C (85.5 °F). However, it reached 33.8 °C (92.8 °F) in April 2018.
Precipitation amounts to 55 mm (2.2 in), distributed over 7 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 67%.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 18.5 °C (65.5 °F). Therefore, the sea is very cool for swimming.

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In May, the weather in Bahia Blanca is usually mild. The average temperature is of 12.2 °C (54 °F), with a minimum of 6 °C (42.7 °F) and a maximum of 18.5 °C (65.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -2 °C (29 °F). However, it dropped to -5.5 °C (22.1 °F) in May 2007.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 25 °C (77.5 °F). However, it reached 31.8 °C (89.2 °F) in May 2009.
Precipitation amounts to 40 mm (1.6 in), distributed over 6 days.
The day lasts on average 10 hours and 0 minutes.
There are on average 4 hours of sunshine per day. So, the sun shines 41% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is 19 kph (12 mph).
The average sea temperature is of 16 °C (61 °F). Therefore, the sea is cold for swimming.

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In June, the weather in Bahia Blanca is usually mild. The average temperature is of 9.1 °C (48 °F), with a minimum of 2.9 °C (37.3 °F) and a maximum of 15.2 °C (59.3 °F).
On the coldest nights, the temperature usually drops to around -4.5 °C (24 °F). However, it dropped to -9.8 °C (14.4 °F) in June 2002.
On the warmest days, the temperature usually reaches around 21 °C (69.5 °F). However, it reached 24.5 °C (76.1 °F) in June 2013.
Precipitation amounts to 30 mm (1.2 in), distributed over 6 days.
The day lasts on average 9 hours and 30 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
There are on average 3.5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is 20 kph (13 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.

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In July, the coldest month of the year, the weather in Bahia Blanca is usually quite mild. The average temperature is of 8.3 °C (47 °F), with a minimum of 1.9 °C (35.5 °F) and a maximum of 14.7 °C (58.4 °F).
On the coldest nights of the month, the temperature usually drops to around -5 °C (23 °F). However, it dropped to -10 °C (14 °F) in July 2007.
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 July 2008.
Precipitation amounts to 30 mm (1.2 in), distributed over 6 days.
The day lasts on average 9 hours and 50 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 37% of the time.
The average humidity is 70%.
The average wind speed is 20 kph (12 mph).
The average sea temperature is of 12 °C (53.5 °F). Therefore, the sea is very cold for swimming.

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In August, the weather in Bahia Blanca is usually mild. However, there are remarkable differences between night and day. The average temperature is of 10.6 °C (51 °F), with a minimum of 3.7 °C (38.7 °F) and a maximum of 17.5 °C (63.4 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -7.9 °C (17.8 °F) in August 2013.
On the warmest days of the month, the temperature usually reaches around 25.5 °C (77.5 °F). However, it reached 32.6 °C (90.7 °F) in August 2013.
Precipitation amounts to 35 mm (1.4 in), distributed over 5 days.
The day lasts on average 10 hours and 40 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 64%.
The average wind speed is 21 kph (13 mph).
The average sea temperature is of 11 °C (52 °F). Therefore, the sea is very cold for swimming.

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In September, the weather in Bahia Blanca is usually mild. However, there are remarkable differences between night and day. The average temperature is of 12.7 °C (55 °F), with a minimum of 5.6 °C (42 °F) and a maximum of 19.9 °C (67.8 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around -3 °C (26.5 °F). However, it dropped to -5.8 °C (21.6 °F) in September 2008.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 30.5 °C (86.9 °F) in September 2013.
Precipitation amounts to 50 mm (2 in), distributed over 7 days.
The day lasts on average 11 hours and 55 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 61%.
The average wind speed is 21 kph (13 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 October, the weather in Bahia Blanca is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 15.9 °C (61 °F), with a minimum of 8.6 °C (47.4 °F) and a maximum of 23.2 °C (73.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 0.5 °C (33 °F). However, it dropped to -3.2 °C (26.2 °F) in October 2011.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 30.5 °C (86.5 °F). However, it reached 34.5 °C (94.1 °F) in October 1999.
Precipitation amounts to 75 mm (3 in), distributed over 9 days.
The day lasts on average 13 hours and 10 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 49% of the time.
The average humidity is 61%.
The average wind speed is 21 kph (13 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 November, the weather in Bahia Blanca is usually warm. However, there are remarkable differences between night and day. The average temperature is of 19.4 °C (67 °F), with a minimum of 11.6 °C (53 °F) and a maximum of 27.2 °C (80.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to -0.4 °C (31.3 °F) in November 2007.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 37.5 °C (99.5 °F) in November 2008.
Precipitation amounts to 55 mm (2.2 in), distributed over 7 days.
The day lasts on average 14 hours and 20 minutes. So the days are long.
There are on average 8.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 55%.
The average wind speed is 22 kph (14 mph).
The average sea temperature is of 15.5 °C (60 °F). Therefore, the sea is cold for swimming.

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In December, the weather in Bahia Blanca is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 22.8 °C (73 °F), with a minimum of 14.6 °C (58.3 °F) and a maximum of 30.9 °C (87.6 °F).
On the coldest nights of the month, the temperature usually drops to around 6 °C (43 °F). However, it dropped to 2.8 °C (37 °F) in December 2018.
On the warmest days of the month, the temperature usually reaches around 37 °C (98.5 °F). However, it reached 40.8 °C (105.4 °F) in December 2013.
Precipitation amounts to 65 mm (2.6 in), distributed over 7 days.
The day lasts on average 14 hours and 50 minutes. So the days are long. December 21, the summer solstice, is the longest day of the year in the Southern Hemisphere.
There are on average 8.5 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 49%.
The average wind speed is 24 kph (15 mph).
The average sea temperature is of 18 °C (65 °F). Therefore, the sea is cold for swimming.