Climate in Buenos Aires

Average daytime and nighttime temperatures

All climatic diagrams on this site result from the collected data from 24 measuring weather stations in Buenos Aires.
All data correspond to the average monthly values of the last 20 years.

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Buenos Aires is one of the coldest regions in Argentina with an average daily high temperature of only 22 degrees centigrade. A beach holiday can also be enjoyed in the warmer season, but water temperatures will not reach much more than 19 °C. Due to the warmer temperatures the best time for traveling is in January. Less attractive are the cold months from May to September.
Overview: Climate in Argentina
Daylengths and sun positions in Argentina
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Buenos Aires
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 9 hours per day, January is the sunniest month in the region of Buenos Aires. In June the sun shines the shortest.
Rainy days per monthRainy days per month in Buenos Aires
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 7 rainy days, October offers the most number of rainy days, and in June the least.
Precipitation in mm/dayPrecipitation in Buenos Aires
The amount of precipitation is measured in millimeters per square meter. Thus, at two mm/day, two liters of water fall on one square meter within 24 hours. With only 1.7 mm, the least rain falls in July. February, on the other hand, has the most rain.
Water temperatureWater temperatures in Buenos Aires
Water temperature depends not only on solar radiation within the same region, but also on ocean currents. For example, depending on the season, cold or warm water masses are moved from other areas. The warmest temperatures in Buenos Aires are in February, when the water is 19 °C.
Relative humidity in %Relative humidity in Buenos Aires
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With humidity averaging 80%, June is the most uncomfortable. In December, on the other hand, it is easier to endure.
Absolute humidity in g/m³Absolute humidity in Buenos Aires
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy. This limit is only reached in a few months in Buenos Aires, although these are always average values.
Humidex in °CHumidex in Buenos Aires
The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Map of Buenos Aires

Most important cities in the region »Buenos Aires«

Alone 3 major cities with over 500,000 inhabitants are located here. The region has a west-east extension of about 500 km and over 620 km from north to south.

CityPopulationGeo position
La Plata694,16734° 55' 17"S57° 57' 16"W
Mar del Plata553,93538° 0' 8"S57° 33' 27"W
Quilmes518,78834° 43' 27"S58° 15' 10"W
Morón319,93434° 39' 12"S58° 37' 11"W
Bahía Blanca276,54638° 43' 11"S62° 16' 21"W
San Nicolás de los Arroyos127,74233° 20' 9"S60° 13' 31"W
Tandil104,32537° 19' 18"S59° 7' 59"W
Zárate88,78134° 5' 53"S59° 1' 43"W
Pergamino87,65233° 53' 24"S60° 34' 25"W
Olavarría86,32036° 53' 34"S60° 19' 21"W
Junín85,00734° 35' 2"S60° 56' 36"W
Luján81,74934° 34' 13"S59° 6' 18"W
Campana81,61234° 10' 7"S58° 57' 33"W
Necochea80,47838° 32' 50"S58° 44' 12"W
Punta Alta57,20938° 52' 33"S62° 4' 25"W
Chivilcoy54,51434° 53' 44"S60° 1' 0"W
Azul53,94136° 46' 37"S59° 51' 31"W
Mercedes52,94934° 39' 5"S59° 25' 50"W
Tres Arroyos47,13638° 22' 26"S60° 16' 47"W
San Isidro45,19034° 28' 17"S58° 30' 28"W
Lincoln41,80834° 51' 59"S61° 31' 49"W
Nueve de Julio34,71835° 26' 40"S60° 52' 59"W
Chacabuco34,58734° 38' 30"S60° 28' 26"W
Pontevedra33,51534° 44' 59"S58° 41' 13"W
Tigre31,10634° 25' 34"S58° 34' 47"W
Adrogué28,26534° 48' 1"S58° 23' 2"W
Coronel Suárez27,00037° 27' 17"S61° 56' 0"W
Dolores25,19036° 18' 48"S57° 40' 45"W
Veinticinco de Mayo24,66835° 25' 56"S60° 10' 22"W
Villa Gesell23,25737° 15' 50"S56° 58' 23"W

Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants:, United Nations Statistics Division and own research.
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