January weather forecast
Buenos Aires, Argentina

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.