September weather forecast
Bahía Blanca, Argentina

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Weather in September

September brings a significant shift in the weather with the onset of Spring in Bahía Blanca. With temperatures rising to a comfortable 16.8°C (62.2°F), the city lights up with blooming flowers and sunny landscapes. The rainfall remains moderate, not exceeding 15mm (0.59"), rendering an ideal environment for the city dwellers and sightseers alike to experience Bahía Blanca in all its glorious color. The academic city bustles with activity and the days gradually lengthen, providing a fantastic backdrop for numerous outdoor and entertainment events that fill the city's calendar.

Temperature

September's advent denotes a minor fluctuation in the average high-temperature to a still refreshing 16.8°C (62.2°F) from August's 15.2°C (59.4°F). Bahía Blanca's average low-temperature for the month of September records at a chilly 8.4°C (47.1°F).

Humidity

In September, the average relative humidity is 62%.

Rainfall

In Bahía Blanca, in September, it is raining for 6.3 days, with typically 15mm (0.59") of accumulated precipitation. In Bahía Blanca, during the entire year, the rain falls for 73.5 days and collects up to 280mm (11.02") of precipitation.

Snowfall

In Bahía Blanca, snow does not fall in January through June, August through December.

Sea temperature

The months with the coldest seawater are August and September, with an average sea temperature of 12°C (53.6°F).
Note: Unprotected swimming in 12°C (53.6°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.

Daylight

In Bahía Blanca, the average length of the day in September is 11h and 52min.
On the first day of the month, sunrise is at 07:30 and sunset at 18:47. On the last day of September, sunrise is at 06:44 and sunset at 19:13 -03.

Sunshine

In Bahía Blanca, Argentina, the average sunshine in September is 8.4h.

UV index

June, July and September, with an average maximum UV index of 3, are months with the lowest UV index in Bahía Blanca. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index, 3 during September, leads to the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.

Frequently asked questions

What are the temperatures in September?

During September, Bahía Blanca experiences an average high-temperature of 16.8°C (62.2°F) and a low-temperature of 8.4°C (47.1°F). In February, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is computed to be 29°C (84.2°F).

What is the average humidity in September?

In September, the average relative humidity is 62%.

How many days does it rain in September?

In Bahía Blanca, in September, during 6.3 rainfall days, 15mm (0.59") of precipitation is typically accumulated.

When it does not snow?

January through June, August through December are months without snowfall.

What are the months with the coldest sea water?

August and September, with an average sea temperature of 12°C (53.6°F), are months with the coldest seawater.

What is the sea water temperature in September?

In Bahía Blanca, the average seawater temperature in September is 12°C (53.6°F). Swimming in 12°C (53.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

How many hours of daylight does Bahía Blanca have in September?

The average day length in September is 11h and 52min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 07:30 and sunset at 18:47. On the last day of the month, in Bahía Blanca, sunrise is at 06:44 and sunset at 19:13 -03.

How long on average sun shines in September?

The average sunshine duration in September is 8.4h.

What are the months with the lowest UV index?

The months with the lowest UV index are June, July and September, with an average maximum UV index of 3.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Bahía Blanca, Argentina

Average temperature in September - Bahía Blanca, Argentina
  • Average high temperature in September: 16.8°C

The warmest month (with the highest average high temperature) is January (29.8°C).
The month with the lowest average high temperature is July (12.6°C).

  • Average low temperature in September: 8.4°C

The month with the highest average low temperature is January (18.9°C).
The coldest month (with the lowest average low temperature) is July (6.2°C).

Average pressure in September
Bahía Blanca, Argentina

Average pressure in September - Bahía Blanca, Argentina
  • Average pressure in September: 1017.7mbar

The month with the highest atmospheric pressure is July (1017.9mbar).
The month with the lowest atmospheric pressure is December (1009.7mbar).

Average wind speed in September
Bahía Blanca, Argentina

Average wind speed in September - Bahía Blanca, Argentina
  • Average wind speed in September: 17.4km/h

The windiest month (with the highest average wind speed) is June (19.4km/h).
The calmest months (with the lowest average wind speed) are April and May (16.7km/h).

Average humidity in September
Bahía Blanca, Argentina

Average humidity in September - Bahía Blanca, Argentina
  • Average humidity in September: 62%

The months with the highest relative humidity are May and July (65%).
The months with the lowest relative humidity are January and December (44%).

Average rainfall in September
Bahía Blanca, Argentina

Average rainfall in September - Bahía Blanca, Argentina
  • Average rainfall in September: 15mm

The wettest month (with the highest rainfall) is November (44mm).
The driest month (with the least rainfall) is June (12mm).

Average rainfall days in September
Bahía Blanca, Argentina

Average rainfall days in September - Bahía Blanca, Argentina
  • Average rainfall days in September: 6.3 days

The month with the highest number of rainy days is November (7.9 days).
The month with the least rainy days is June (3.9 days).

Average snowfall days in September
Bahía Blanca, Argentina

Average snowfall days in September - Bahía Blanca, Argentina
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is July (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, August, September, October, November and December (0 days).

Average sea temperature in September
Bahía Blanca, Argentina

Average sea temperature in September - Bahía Blanca, Argentina
  • Average sea temperature in September: 12°C

The best months for swimming (with the highest average sea temperature) are February and March (21°C).
The coldest months (with the lowest average sea temperature) are August and September (12°C).

Average daylight in September /
Average sunshine in September
Bahía Blanca, Argentina

Average daylight in September / Average sunshine in September - Bahía Blanca, Argentina
  • Average daylight in September: 11h and 5min

The month with the longest days is December (Average daylight: 14h and 48min).
The month with the shortest days is June (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is December (Average sunshine: 11h and 42min).
The month with the least sunshine is June (Average sunshine: 6h and 18min).

Average sunshine days in September
Bahía Blanca, Argentina

Average sunshine days in September - Bahía Blanca, Argentina
  • Average sunshine days in September: 23 days

The month with the most sunshine days is August (26.1 days).
The month with the least sunshine days is February (20.5 days).

Average UV index in September
Bahía Blanca, Argentina

Average UV index in September - Bahía Blanca, Argentina
  • Average UV index in September: 3

The months with the highest UV index are January, February, March and December (UV index 6).
The months with the lowest UV index are June, July and September (UV index 3).

Average cloud cover in September
Bahía Blanca, Argentina

Average cloud cover in September - Bahía Blanca, Argentina
  • Average cloud cover in September: 28

The months with the most cloud cover are May and July (Cloud cover 30).
The month with the least cloud cover is January (Cloud cover 13).

Average visibility in September
Bahía Blanca, Argentina

Average visibility in September - Bahía Blanca, Argentina
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Bahía Blanca, Argentina

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