Buenos Aires, Argentina Climate & Monthly Averages
The climate of Buenos Aires
Buenos Aires records 91 wet days and 9.7 hours of daily sunshine in an average year. Temperatures follow a humid subtropical pattern, running 57°F (14°C) in July up to 83°F (28°C) in January.
Climate quick facts
- Hottest month: January - highs near 83°F (28°C)
- Coldest month: July - highs near 57°F (14°C)
- Decade extremes (2015-2024): 102°F (39°C) high · 29°F (-1°C) low
- Wettest month: March (8 rainy days) · Sunniest: December (12.4 h sun/day)
- Climate type: humid subtropical
- Annual swing: 14°C between the average warmest and coolest month · day to night: 7°C
- Average humidity: 73%
Temperatures through the year
Four of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is March through April. July bottoms out at 57°F (14°C) in daylight, 46°F (8°C) after dark. January is the warm end of the year, averaging 83°F (28°C) by day and 69°F (21°C) overnight. December is the brightest month at 12.4 hours of sun a day, against an annual average of 9.7.
Rain, sun and snow
Precipitation concentrates in March - 4.7 inches (118 mm) on 8 days - and thins out by June. Days and nights are about 7°C apart on average - narrower than about 80% of the cities we track. The gridded 2015-2024 daily record for this location tops out at 102°F (39°C) and bottoms at 29°F (-1°C) - decade extremes, not all-time station records.
How Buenos Aires compares
- Buenos Aires sits close to the middle of our dataset on most measures: 64°F (18°C) as an annual average, 37.8 inches (960 mm) of precipitation and 9.7 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 83° | 69° | 9 | 3.2 in | 12.0 h/day | 14.2 h | 28% | 67% |
| February | 82° | 68° | 7 | 3.0 in | 11.4 h/day | 13.4 h | 24% | 69% |
| March | 77° | 65° | 8 | 4.7 in | 10.5 h/day | 12.4 h | 26% | 73% |
| April | 71° | 60° | 8 | 4.2 in | 8.5 h/day | 11.3 h | 28% | 76% |
| May | 63° | 52° | 6 | 2.9 in | 7.6 h/day | 10.3 h | 20% | 79% |
| June | 59° | 47° | 7 | 1.9 in | 7.5 h/day | 9.8 h | 23% | 80% |
| July | 57° | 46° | 8 | 2.9 in | 7.5 h/day | 10.0 h | 27% | 80% |
| August | 61° | 48° | 6 | 2.4 in | 8.1 h/day | 10.8 h | 21% | 77% |
| September | 64° | 51° | 6 | 2.7 in | 9.0 h/day | 11.9 h | 21% | 74% |
| October | 69° | 55° | 9 | 3.3 in | 10.1 h/day | 13.0 h | 28% | 71% |
| November | 76° | 62° | 8 | 3.4 in | 11.5 h/day | 14.0 h | 28% | 67% |
| December | 81° | 66° | 8 | 3.3 in | 12.4 h/day | 14.5 h | 25% | 64% |
Buenos Aires month by month
Average high and low for each month, with the bar showing where it sits in Buenos Aires's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 9 days
- Sunshine
- 12.0 h
- Daylight
- 14.2 h
February
- Rain
- 7 days
- Sunshine
- 11.4 h
- Daylight
- 13.4 h
March
- Rain
- 8 days
- Sunshine
- 10.5 h
- Daylight
- 12.4 h
April
- Rain
- 8 days
- Sunshine
- 8.5 h
- Daylight
- 11.3 h
May
- Rain
- 6 days
- Sunshine
- 7.6 h
- Daylight
- 10.3 h
June
- Rain
- 7 days
- Sunshine
- 7.5 h
- Daylight
- 9.8 h
July
- Rain
- 8 days
- Sunshine
- 7.5 h
- Daylight
- 10.0 h
August
- Rain
- 6 days
- Sunshine
- 8.1 h
- Daylight
- 10.8 h
September
- Rain
- 6 days
- Sunshine
- 9.0 h
- Daylight
- 11.9 h
October
- Rain
- 9 days
- Sunshine
- 10.1 h
- Daylight
- 13.0 h
November
- Rain
- 8 days
- Sunshine
- 11.5 h
- Daylight
- 14.0 h
December
- Rain
- 8 days
- Sunshine
- 12.4 h
- Daylight
- 14.5 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Buenos Aires
Spring (September through November)
Spring settles into easy warmth here - highs near 70°F (21°C), nights near 56°F (13°C), and expect showers on roughly 23 days across the season. Daylight is generous - around 10.2 hours of sun a day.
Summer (December through February)
Summer in Buenos Aires runs hot, with daytime highs averaging 82°F (28°C) and nights around 68°F (20°C); expect showers on roughly 23 days across the season. Daylight is generous - around 11.9 hours of sun a day.
Fall (March through May)
Fall in Buenos Aires is pleasantly warm, with daytime highs averaging 70°F (21°C) and nights around 59°F (15°C); expect showers on roughly 23 days across the season.
Winter (June through August)
Winter is mild here - highs near 59°F (15°C), nights near 47°F (8°C), and expect showers on roughly 22 days across the season.
Climate questions, answered
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Best time to visit Buenos Aires
The best time to visit Buenos Aires is generally August to September and February, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window sit near 70°F (21°C), with rain on about 7 days a month. For the same question asked the other way round, see where else is warm in August.
Pack for Buenos Aires with light clothing for the warm months, a warm jacket and layers for the cooler season and a compact umbrella or rain shell. January nights average 69°F (21°C), so evenings rarely match the afternoons.
Buenos Aires temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.