Buenos Aires Weather in January

Buenos Aires in January averages 30°C (86°F) during the day and 18°C (64°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Buenos Aires in January

The climate data from previous years indicates about 8 days of rain, averaging 90 mm (3.5 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Buenos Aires in January

January in Buenos Aires brings typical temperatures with highs around 30°C (86°F) and lows of 18°C (64°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. Expect some days to be hotter than these averages. Stay cool by wearing light clothing and drinking plenty of water throughout the day.

Sunshine in Buenos Aires in January

Expect sunny days throughout the month, with an estimated 285 hours of sunshine. This makes it a pleasant time to visit Buenos Aires.

Wind Speed in Buenos Aires in January

Average wind speeds reach 3 m/s (6 knots) in January, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.

Average water temperature in January

The water is 20°C (68°F) this month — a comfortable temperature that most swimmers enjoy. Warm enough to stay in without getting cold quickly.

January in Buenos Aires has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.

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• January
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For a detailed overview over the year and the best time to visit Argentina, check out our Buenos Aires's climate page.

Buenos Aires Temperature in January

Min Temperature 18°C (64°F)  

Max Temperature 30°C (86°F)  

Water Temperature 20°C (68°F)  

Chance of Rain 27%  

Precipitation 90 mm (3.5 in)  

Rainy days 8 days  

Humidity 64%  

Windspeed 3 m/s (6 knots)  

Sunshine 285 hours  

Percentage Sunshine  

Daily Historical Temperatures

51-year average (1976-2026)

Based on our historical records, temperatures in Buenos Aires typically stay consistent throughout January, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows typically ranging from 17°C (63°F) to 19°C (66°F).

Average temperatures in January

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Daily Historical Precipitation

51-year average (1976-2026)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in January

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Historical weather for Buenos Aires in January

Browse day-by-day weather records for Buenos Aires spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Buenos Aires historical weather extremes in January

According to our 49 years of weather records for Buenos Aires, the following extremes were recorded between 1976 and 2025.

• On January 14, 2022, temperatures climbed to 42°C (108°F), marking the warmest January day on record.
• The coldest January day was on January 31, 2005, with a maximum of 17°C (63°F).
• Buenos Aires registered its coldest January night on January 15, 1992, with temperatures dropping to 7°C (45°F).

What to Wear in Buenos Aires in January

Warm temperatures in January make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 20°C (68°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Buenos Aires in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our Buenos Aires's climate page.

More climate data for Buenos Aires

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Buenos Aires climate overview or explore weather in Argentina.