Buenos Aires weather
World cities · Argentina · 34.60°S 58.38°W
Buenos Aires, in Argentina, has its warmest weather in January, when daytime temperatures average 28.6°C, while July nights are the coldest at around 7.1°C. The city sees roughly 894mm of rain a year; March is normally the wettest month and June the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | 28.6° | 21° | 75mm | 8 |
| Feb | 27.5° | 19.7° | 79mm | 7 |
| Mar | 25.6° | 19.2° | 167mm | 9 |
| Apr | 21.2° | 14.8° | 99mm | 8 |
| May | 17° | 10.1° | 48mm | 4 |
| Jun | 14.8° | 8.4° | 36mm | 7 |
| Jul | 14° | 7.1° | 43mm | 6 |
| Aug | 15.8° | 8.5° | 59mm | 6 |
| Sep | 18.1° | 10.8° | 63mm | 6 |
| Oct | 21.5° | 13.3° | 66mm | 7 |
| Nov | 25° | 17° | 92mm | 8 |
| Dec | 26.8° | 18.9° | 67mm | 7 |
Seasons in Buenos Aires
Spring (September–November). Daytime highs in Buenos Aires climb from 18.1°C in September to 25°C by November, while nights ease from 10.8°C to 17°C. The season brings around 221mm of rain in total.
Summer (December–February). The warmest stretch of the year: afternoons average 27.6°C, peaking in January at 28.6°C. December is usually the driest of the summer months (67mm over ~7 rainy days). Around the December solstice, Buenos Aires gets roughly 14.3 hours of daylight.
Autumn (March–May). Daytime temperatures fall from 25.6°C in March to 17°C by May, and rainfall builds to its annual peak — March is the wettest month of the year (167mm).
Winter (June–August). Nights average 8.0°C, with July the coldest month (average low 7.1°C, daytime high 14°C). Expect about 19 days with measurable rain over the three months, and only around 9.7 hours of daylight in mid-June.
How Buenos Aires compares
| Buenos Aires | UK town average | |
|---|---|---|
| Annual rainfall | 894mm | 1054mm |
| Rainy days per year | 83 | 167 |
| Summer daytime high | 27.6°C | 19.7°C |
| Winter night low | 8.0°C | 3.4°C |
Buenos Aires is about 15% drier than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Buenos Aires weather FAQs
What is the warmest month in Buenos Aires?
January is typically the warmest month in Buenos Aires, with average daytime highs of 28.6°C. Summer afternoons (December–February) average around 27.6°C.
What is the wettest month in Buenos Aires?
March is usually the wettest month, with around 167mm of rain over roughly 9 rainy days. June is typically the driest (36mm).
How much does it rain in Buenos Aires per year?
Buenos Aires receives roughly 894mm of precipitation per year, spread over about 83 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Buenos Aires?
Winter nights (June–August) in Buenos Aires average around 8.0°C, with July typically the coldest month (average low 7.1°C).
When is the best time to visit Buenos Aires for good weather?
Late spring and summer offer the most reliable weather in Buenos Aires. December is typically the driest of the warm months (67mm of rain), while January is the warmest, averaging 28.6°C by day — and near the December solstice there are around 14 hours of daylight to enjoy.
How does Buenos Aires's weather compare with the UK?
Buenos Aires receives 894mm of rain a year, about 15% drier than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 27.6°C against a UK-town average of 19.7°C, and winter nights average 8.0°C versus 3.4°C.