Buenos Aires enjoys a humid subtropical climate with hot, humid summers and mild, damp winters. The city experiences four distinct seasons, with spring and autumn bringing changeable weather and abundant blooms. Rainfall is spread throughout the year, and the maritime influence helps prevent temperature extremes, making Buenos Aires a pleasant destination year-round.
The best times to travel section shows how the months compare for a visit, so you can find the time of year that fits what you want to do.
Background colours of the months:
The colour shows the typical temperature: yellow (hot), green (mild) and blue (cold). How strong the colour is shows the travel season: full colour means high season, soft colour means shoulder season and soft-striped means off season.
Weather symbols:
Each month has one symbol showing what the weather is typically like, such as hot and sunny, freezing or a rainy or snowy season. Use them to quickly spot months that match the weather you want, or to avoid the ones that don't.
Crowdedness:
The people icon shows how busy the place usually is. The more people, the more crowded it gets.
Additional notes:
The grey info boxes point out special things worth knowing, like recurring weather issues or seasonal events.
Buenos Aires features a humid subtropical climate (Cfa), marked by hot, humid summers and cool, damp winters. Summer (December–February) brings average highs of 28–31°C, with humidity making it feel warmer. Nights remain warm, and short, intense thunderstorms are common, especially in January and February. The city receives abundant sunshine in summer, with up to 9–10 hours per day, but heatwaves can push temperatures above 40°C. The maritime influence of the Río de la Plata helps moderate extreme heat, and occasional southeasterly winds (sudestada) can bring heavy rain and cooler spells.
Autumn (March–May) and spring (September–November) are transitional seasons, featuring mild, variable weather and frequent rain showers. Spring is especially beautiful with jacaranda trees in bloom and temperatures rising from 15°C to 25°C. Autumn sees temperatures drop from the summer highs to a comfortable 15–22°C. Both seasons are among the rainiest, but showers are usually brief and followed by sunshine. Winters (June–August) are mild, with average highs of 14–17°C and lows around 7–9°C. Frost is rare, and snow is extremely uncommon, having occurred only a few times in the city’s history. Winters are often cloudy, humid (up to 80% or more), and windy, with the Pampero wind bringing cold, dry air from the south. Daylight hours are shortest in winter, but occasional warm spells can occur.
The city averages about 1,100 mm of rainfall annually, with peaks in October–November and March–April. Winds are a constant feature, especially in winter, and the urban heat island effect keeps the city warmer than surrounding rural areas. Buenos Aires enjoys about 2,500–2,800 hours of sunshine per year, with the sunniest months from October to March. The climate supports vibrant outdoor life, from street cafés to city parks, almost year-round.
| Average climate data for Buenos Aires, Argentina | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 31 | 30 | 26 | 23 | 19 | 15 | 14 | 17 | 18 | 21 | 25 | 29 | 31 |
| Average minimum temperature (°C) | 20 | 20 | 17 | 15 | 12 | 9 | 8 | 9 | 10 | 12 | 15 | 18 | 8 |
| Average precipitation (mm) | 42 | 59 | 49 | 44 | 45 | 38 | 51 | 42 | 44 | 67 | 79 | 69 | 630 |
| Average rainfall days (days) | 7 | 10 | 10 | 10 | 8 | 7 | 10 | 7 | 9 | 11 | 10 | 10 | 108 |
| Average relative humidity (%) | 57 | 60 | 66 | 69 | 77 | 74 | 76 | 72 | 75 | 72 | 67 | 57 | 69 |
| Average wind speed (km/h) | 14 | 14 | 13 | 13 | 13 | 15 | 15 | 15 | 16 | 15 | 14 | 13 | 14 |
| Average water temperature (°C) | 25 | 24 | 23 | 19 | 16 | 13 | 12 | 13 | 14 | 18 | 21 | 22 | 18 |
| Average daily daylight hours (h) | 14 | 13 | 12 | 11 | 10 | 9 | 10 | 10 | 11 | 13 | 13 | 14 | 12 |
| Average daily sunshine hours (h) | 10 | 9 | 8 | 8 | 6 | 5 | 6 | 7 | 7 | 8 | 10 | 11 | 8 |
| Average cloud coverage (%) | 18 | 21 | 22 | 27 | 35 | 32 | 37 | 32 | 33 | 33 | 25 | 20 | 28 |
| Average UV index | 7 | 6 | 6 | 5 | 4 | 3 | 3 | 4 | 4 | 5 | 6 | 6 | 5 |
The best time to visit Buenos Aires is during spring (September–November) and autumn (March–May), when temperatures are mild (15–25°C), humidity is comfortable, and the city is alive with festivals, outdoor events, and blooming jacarandas. These seasons offer the most pleasant weather for sightseeing and enjoying the city’s vibrant street life.
The least favourable time to visit is during the peak of summer (January–February), when heat and humidity are at their highest, and thunderstorms are frequent. Outdoor activities can be uncomfortable, and many locals leave the city for holidays, though tourist attractions remain open.
Buenos Aires has a humid subtropical climate with hot, humid summers, mild winters, and distinct spring and autumn seasons. Rainfall is spread throughout the year, and the maritime influence keeps temperature extremes rare.
Summer temperatures in Buenos Aires typically reach 28–31°C, but heatwaves can push highs above 40°C. Humidity is high, making it feel even warmer, and nights remain mild to warm.
Rainfall is moderate to high, with annual totals around 1,100 mm. The rainiest periods are spring (October–November) and autumn (March–April), but showers are usually brief and followed by sunshine.
Snow is extremely rare in Buenos Aires, with only a few recorded events in the city’s history. Winters are generally mild, with frost uncommon and temperatures rarely dropping below 5°C.
Yes, winds are common, especially in winter. The Pampero, a cold, dry wind from the south, can bring sharp drops in temperature and clear, dry weather. The sudestada brings rain and cooler spells from the southeast.
Pack light, breathable clothes and sun protection for summer, and bring layers, a medium-weight coat, and an umbrella for autumn, winter, or spring. Comfortable shoes are essential for city walks.
Buenos Aires is sunniest from October to March, with up to 9–10 hours of sunshine per day in summer. Winter months are cloudier, but occasional clear, brisk days are common.
The warmest month, with the highest average maximum temperature, is January (31 °C). The month with the lowest average maximum temperature is July (14.1 °C). Overall, the average maximum temperature over the whole year is 22.3 °C.
The month with the highest average minimum temperature is February (20 °C). The coldest month, with the lowest average minimum temperature, is July (8 °C). Overall, the average minimum temperature over the whole year is 13.8 °C.
The month with the highest average water temperature is January (25.1 °C). The month with the lowest average water temperature is July (11.8 °C). Overall, the average water temperature over the whole year is 18.3 °C.
The wettest month, with the highest amount of precipitation, is November (78.9 mm). The driest month, with the least amount of precipitation, is June (37.6 mm). Over the whole year there are 629.9 mm of rainfall on average.
The month with the most days of rain is October (10.7 days). The month with the fewest days of rain is August (7.1 days). Over the whole year there are 108.3 days of rain on average.
The month with the highest average relative humidity is May (76.6 %). The month with the lowest average relative humidity is January (56.8 %). The overall average relative humidity over the whole year is 68.5 %.
The windiest month, with the highest average wind speed, is September (15.9 km/h). The calmest month, with the lowest average wind speed, is March (13 km/h). The overall average wind speed over the whole year is 14.2 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is July (36.7 %). The month with the clearest skies, so the lowest cloud coverage, is January (17.7 %). Over the whole year there is an average cloud coverage of 27.8 %.
The month with the longest days, so the most daylight, is December (Average daylight: 14 h). The month with the shortest days, so the least daylight, is June (Average daylight: 9.1 h). Over the whole year there are 11.7 h of daylight per day on average.
The month with the most sunshine per day is December (Average sunshine: 11.1 h). The month with the least sunshine per day is June (Average sunshine: 5.1 h). Over the whole year there are 7.9 h of sunlight per day on average.
The month with the highest average UV index is January (UV index: 7). The months with the lowest average UV index are June and July (UV index: 3). Over the whole year the average UV index is 4.9.
