Buenos Aires

Summers are hot and humid, while winters are cool during the day and chilly at night. Extreme temperatures are rare.

Buenos Aires has four distinct seasons. As a result of maritime influences from the adjoining Atlantic Ocean, the climate is temperate with extreme temperatures being rare. Because the city is located in an area where the Pampero and Sudestada winds pass by, the weather is variable due to these contrasting air masses.

Summers are hot and humid. The warmest month is January, with a daily average of 24.9 °C/77 °F. Although heat waves are common during summer, most of them persist less than a week and are followed by the passage of the cold, dry Pampero wind which brings violent, intense thunderstorms before the temperature drops.

Winters are cool during the day and chilly at night, with an average high of 16.6 °C/62 °F and low of 8.3 °C/47 °F. July is the coolest month, with an average temperature of 11.0 °C/52 °F. Cold spells originating from Antarctica occur almost every year, and can persist for several days. Occasionally, warm air masses from the north bring a warmer condition. Snow is very rare in the city.

Spring and autumn are characterized by variable weather conditions. Cold air from the south can bring a cooler condition, while hot humid air from the north brings a hot condition. Heavy fogs can occur during autumn and winter.

The city receives about 1,258 mm/49.5" of precipitation per year. Because of its geography along with an inadequate drainage network, the city is highly vulnerable to flooding during periods of heavy rainfall.[Source]