January weather forecast
Buenos Aires, Argentina

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The Congress Square monument in Buenos Aires, Argentina
The Congress Square monument in Buenos Aires, Argentina

Weather in January

January offers the peak of Buenos Aires' summer, inviting visitors with sunny days and blue skies. The city contends with the year's highest temperature, hoisting average high and low temperatures to 30.9°C (87.6°F) and 20°C (68°F) respectively. Abundance of sunshine totals 10.4 hours per day, making the city desirable for outdoor explorations. The average sea temperature is warm and suitable for swimming and other water activities. Winds are light to moderate, providing some relief from the summer heat.

Temperature

January tends to be the warmest month in Buenos Aires, with temperatures averaging a daily high of 30.9°C (87.6°F) and a low of 20°C (68°F).

Heat index

The heat index for January is evaluated at a tropical 34°C (93.2°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

With an average relative humidity of 56%, January is the least humid month in Buenos Aires, Argentina.

Rainfall

In Buenos Aires, during January, the rain falls for 7.5 days and regularly aggregates up to 42mm (1.65") of precipitation. Throughout the year, there are 108.2 rainfall days, and 629mm (24.76") of precipitation is accumulated.

Sea temperature

The month with the warmest seawater in Buenos Aires is January, with an average sea temperature of 25°C (77°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Buenos Aires, the average length of the day in January is 14h and 10min.
On the first day of the month, sunrise is at 05:44 and sunset at 20:09. On the last day of January, sunrise is at 06:12 and sunset at 20:01 -03.

Sunshine

The average sunshine in January is 10.4h.

UV index

January is the month with the highest UV index, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In January, an average UV index of 7 transforms into the following instructions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Attention! UV radiation is markedly stronger with water and sand reflections.

Frequently asked questions

What is the hottest time of year in Buenos Aires?

The highest temperatures in Buenos Aires are recorded in January, with averages reaching a high of 30.9°C (87.6°F) and a low of 20°C (68°F).

How hot is it in Buenos Aires in January?

During January, Buenos Aires experiences an average high-temperature of 30.9°C (87.6°F) and a low-temperature of 20°C (68°F). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in January is evaluated at 34°C (93.2°F).

What is the least humid month in Buenos Aires?

January is the least humid month, with an average relative humidity of 56%.

What is the average humidity in January in Buenos Aires?

In January, the average relative humidity in Buenos Aires, Argentina, is 56%.

How much does it rain in Buenos Aires in January?

In January, the rain falls for 7.5 days. Throughout January, 42mm (1.65") of precipitation is accumulated.

What month is the sea warmest in Buenos Aires?

January is the month with the warmest seawater in Buenos Aires, with an average sea temperature of 25°C (77°F).

What is the sea water temperature in January in Buenos Aires?

In Buenos Aires, Argentina, in January, the average water temperature is 25°C (77°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Buenos Aires have in January?

In Buenos Aires, Argentina, the average day length in January is 14h and 10min.

When are sunrise and sunset in January in Buenos Aires?

On the first day of January, sunrise is at 05:44 and sunset at 20:09. On the last day of the month, sunrise is at 06:12 and sunset at 20:01 -03.

How many hours of sunshine does Buenos Aires have in January?

The average sunshine duration in January is 10.4h.

When is the highest UV index in Buenos Aires?

January is the month with the highest UV index in Buenos Aires, Argentina, with an average maximum UV index of 7.

What is the UV index intensity in January in Buenos Aires?

The average daily maximum UV index in January is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in January
Buenos Aires, Argentina

Average temperature in January - Buenos Aires, Argentina
  • Average high temperature in January: 30.9°C

The warmest month (with the highest average high temperature) is January (30.9°C).
The month with the lowest average high temperature is July (14°C).

  • Average low temperature in January: 20°C

The month with the highest average low temperature is January (20°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).

Average pressure in January
Buenos Aires, Argentina

Average pressure in January - Buenos Aires, Argentina
  • Average pressure in January: 1011.8mbar

The month with the highest atmospheric pressure is July (1019.2mbar).
The month with the lowest atmospheric pressure is December (1011mbar).

Average wind speed in January
Buenos Aires, Argentina

Average wind speed in January - Buenos Aires, Argentina
  • Average wind speed in January: 13.9km/h

The windiest month (with the highest average wind speed) is September (15.8km/h).
The calmest month (with the lowest average wind speed) is March (13.2km/h).

Average humidity in January
Buenos Aires, Argentina

Average humidity in January - Buenos Aires, Argentina
  • Average humidity in January: 56%

The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is January (56%).

Average rainfall in January
Buenos Aires, Argentina

Average rainfall in January - Buenos Aires, Argentina
  • Average rainfall in January: 42mm

The wettest month (with the highest rainfall) is November (78mm).
The driest month (with the least rainfall) is June (38mm).

Average rainfall days in January
Buenos Aires, Argentina

Average rainfall days in January - Buenos Aires, Argentina
  • Average rainfall days in January: 7.5 days

The month with the highest number of rainy days is October (10.8 days).
The month with the least rainy days is August (7 days).

Average sea temperature in January
Buenos Aires, Argentina

Average sea temperature in January - Buenos Aires, Argentina
  • Average sea temperature in January: 25°C

The best month for swimming (with the highest average sea temperature) is January (25°C).
The coldest month (with the lowest average sea temperature) is July (11.9°C).

Average daylight in January /
Average sunshine in January
Buenos Aires, Argentina

Average daylight in January / Average sunshine in January - Buenos Aires, Argentina
  • Average daylight in January: 14h and 1min

The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).

  • Average sunshine in January: 10h and 2min

The month with the most sunshine is December (Average sunshine: 11h and 12min).
The month with the least sunshine is June (Average sunshine: 5h and 48min).

Average sunshine days in January
Buenos Aires, Argentina

Average sunshine days in January - Buenos Aires, Argentina
  • Average sunshine days in January: 21.6 days

The month with the most sunshine days is January (21.6 days).
The month with the least sunshine days is October (17.4 days).

Average UV index in January
Buenos Aires, Argentina

Average UV index in January - Buenos Aires, Argentina
  • Average UV index in January: 7

The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are June and July (UV index 3).

Average cloud cover in January
Buenos Aires, Argentina

Average cloud cover in January - Buenos Aires, Argentina
  • Average cloud cover in January: 17

The month with the most cloud cover is July (Cloud cover 37).
The month with the least cloud cover is January (Cloud cover 17).

Average visibility in January
Buenos Aires, Argentina

Average visibility in January - Buenos Aires, Argentina
  • Average visibility in January: 10km

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).

Buenos Aires, Argentina

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