Buenos Aires, Argentina Weather
Buenos Aires hourly forecast: next 24 hours
Today's high of 65°F (18°C) is right in line with the typical September high of 64°F (18°C).
Current conditions in detail
Buenos Aires weather tomorrow (Wednesday, September 16)
Tomorrow in Buenos Aires looks sunny, with a high of 56° and an overnight low of 46°. Rain is unlikely (5% chance). Winds top out near 12 mph, and the UV index reaches 7 (high).
Buenos Aires 14-day forecast
About the weather in 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.
Buenos Aires weather: 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.
Season by season
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.
Average temperatures in Buenos Aires by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 83° | 69° | 9 | 3.2 in | 12.0 h/day | 67% |
| February | 82° | 68° | 7 | 3.0 in | 11.4 h/day | 69% |
| March | 77° | 65° | 8 | 4.7 in | 10.5 h/day | 73% |
| April | 71° | 60° | 8 | 4.2 in | 8.5 h/day | 76% |
| May | 63° | 52° | 6 | 2.9 in | 7.6 h/day | 79% |
| June | 59° | 47° | 7 | 1.9 in | 7.5 h/day | 80% |
| July | 57° | 46° | 8 | 2.9 in | 7.5 h/day | 80% |
| August | 61° | 48° | 6 | 2.4 in | 8.1 h/day | 77% |
| September | 64° | 51° | 6 | 2.7 in | 9.0 h/day | 74% |
| October | 69° | 55° | 9 | 3.3 in | 10.1 h/day | 71% |
| November | 76° | 62° | 8 | 3.4 in | 11.5 h/day | 67% |
| December | 81° | 66° | 8 | 3.3 in | 12.4 h/day | 64% |