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Weather in Buenos Aires - 14-day forecast

Detailed weather forecast for Buenos Aires, Argentina: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Buenos Aires
today☀️ 11°💧 0.5 mm
Sun☀️ 10°💧 3.3 mm
Mon🌤️ 10°💧 0.2 mm
Tue☀️ 11°💧 0.2 mm
Wed☀️ 16°💧 0.8 mm
Thu☀️ 15°💧 0.8 mm
Fri☁️ 15°💧 0.3 mm
Sat🌧️ 7°💧 4.7 mm
Forecast vs 1991-2020 climate normal

How does the current forecast compare with normal?

We compare the coming days with weather usually observed at this time of year.

NASA POWER

Sunday 6 Sept in Buenos Aires, the forecast high is 10°C. Typical daytime temperatures at this time of year range from 14°C to 18°C, so it will be exceptionally cool. It is cooler than 100% of similar days.

11°Cexceptionally cool
usually 14°C–18°C
cooler than 96% of similar days
night: exceptionally cool rain: more rain than usual wind: typical
10°Cexceptionally cool
usually 14°C–18°C
cooler than 100% of similar days
night: cooler than usual rain: more rain than usual wind: typical
10°Cexceptionally cool
usually 14°C–18°C
cooler than 99% of similar days
night: near normal rain: typical rainfall wind: lighter than usual
11°Cexceptionally cool
usually 14°C–18°C
cooler than 95% of similar days
night: warmer than usual rain: typical rainfall wind: exceptionally light
16°Cnear normal
usually 14°C–18°C
night: exceptionally warm rain: more rain than usual wind: exceptionally light
15°Cnear normal
usually 14°C–18°C
night: exceptionally warm rain: more rain than usual wind: exceptionally light
15°Ccooler than usual
usually 15°C–19°C
cooler than 79% of similar days
night: near normal rain: more rain than usual wind: stronger than usual

How warm was this week in previous years?

Each bar shows the average daily high during the same 7-day period in each year.

swipe to see more years →
10°18°25° 1981: 18°C1982: 17°C1983: 14°C1984: 17°C1985: 18°C1986: 19°C1987: 16°C1988: 16°C1989: 15°C1990: 17°C1991: 18°C1992: 16°C1993: 15°C1994: 14°C1995: 18°C1996: 15°C1997: 16°C1998: 18°C1999: 16°C2000: 17°C2001: 16°C2002: 15°C2003: 16°C2004: 16°C2005: 16°C2006: 17°C2007: 20°C2008: 14°C2009: 15°C2010: 18°C2011: 18°C2012: 17°C2013: 22°C2014: 18°C2015: 16°C2016: 16°C2017: 17°C2018: 18°C2019: 15°C2020: 16°C2021: 16°C2022: 18°C2023: 17°C2024: 17°C2025: 16°C 2026 forecast: 13°C current forecast 13°C 198119902000201020202026
cooler yearstypical rangewarmer years2026 forecastcurrent forecast

From 1981 to 2025, the 5-11 Sept period averaged 17°C by day. The coolest year was 1983 (14°C) and the warmest was 2013 (22°C). The current forecast averages 13°C - lower than in 100% of historical years.

Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.

14-day forecast - Buenos Aires

Buenos Aires - 14-day weather forecast infographic

Buenos Aires 30 & 45-day weather - long-range outlook

Next 15 days · forecast
13°
around 13° at night · days with rain: 4
Weeks 3-4 · avg for September
18°
around 11° at night · rain chance 29%
Weeks 5-7 · avg for October
21°
around 14° at night · rain chance 37%
The 30 & 45-day outlook for Buenos Aires: the next 15 days are a numerical forecast updated daily - on average 13° by day and 13° at night. Further out we rely on multi-year climate averages: around 18° in September, and about 21° in October. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Buenos Aires

Saturday5 September 2026
☀️11°clear sky
sunrise 07:07 · sunset 18:38 · night 5° · evening 12° · rain 0.54 mm · humidity 40% · wind 8 m/s · clouds 3%
Sunday6 September 2026
☀️10°clear sky
sunrise 07:06 · sunset 18:38 · night 8° · evening 9° · rain 3.34 mm · humidity 41% · wind 7 m/s · clouds 3%
Monday7 September 2026
🌤️10°a few clouds
sunrise 07:05 · sunset 18:39 · night 11° · evening 13° · rain 0.18 mm · humidity 62% · wind 6 m/s · clouds 12%
Tuesday8 September 2026
☀️11°clear sky
sunrise 07:03 · sunset 18:40 · night 13° · evening 13° · rain 0.15 mm · humidity 58% · wind 5 m/s · clouds 4%
Wednesday9 September 2026
☀️16°clear sky
sunrise 07:02 · sunset 18:40 · night 15° · evening 17° · rain 0.75 mm · humidity 49% · wind 3 m/s · clouds 2%
Thursday10 September 2026
☀️15°clear sky
sunrise 07:00 · sunset 18:41 · night 15° · evening 17° · rain 0.75 mm · humidity 62% · wind 4 m/s · clouds 10%
Friday11 September 2026
☁️15°overcast clouds
sunrise 06:59 · sunset 18:42 · night 10° · evening 15° · rain 0.33 mm · humidity 67% · wind 11 m/s · clouds 100%
Saturday12 September 2026
🌧️7°light rain
sunrise 06:58 · sunset 18:43 · night 8° · evening 8° · rain 4.71 mm · humidity 83% · wind 11 m/s · clouds 100%
Sunday13 September 2026
☀️9°clear sky
sunrise 06:56 · sunset 18:43 · night 10° · evening 10° · rain 0.12 mm · humidity 50% · wind 5 m/s · clouds 4%
Monday14 September 2026
☁️11°overcast clouds
sunrise 06:55 · sunset 18:44 · night 13° · evening 13° · rain 4.68 mm · humidity 56% · wind 5 m/s · clouds 89%
Tuesday15 September 2026
☀️15°clear sky
sunrise 06:53 · sunset 18:45 · night 15° · evening 16° · rain 1.38 mm · humidity 48% · wind 6 m/s · clouds 29%
Wednesday16 September 2026
☁️14°broken clouds
sunrise 06:52 · sunset 18:45 · night 15° · evening 15° · humidity 65% · wind 4 m/s · clouds 84%
Thursday17 September 2026
☁️15°broken clouds
sunrise 06:50 · sunset 18:46 · night 16° · evening 17° · humidity 69% · wind 4 m/s · clouds 63%
Friday18 September 2026
☁️17°broken clouds
sunrise 06:49 · sunset 18:47 · night 16° · evening 18° · humidity 65% · wind 4 m/s · clouds 82%
Saturday19 September 2026
🌤️18°scattered clouds
sunrise 06:48 · sunset 18:48 · night 18° · evening 18° · humidity 78% · wind 4 m/s · clouds 50%

UV index in Buenos Aires - is it safe to sunbathe?

UV INDEX · 16-DAY FORECASTBuenos Aires03681111+5.7UV MODERATEtoday, daily maxSeek shade around midday. SPF 30+, sunglasses and ahat for longer stays.Unprotected fair skin may burn in about 35 min6Sat5.096Sun6.096Mon7.096Tue8.096Wed9.096Thu10.093Fri11.094Sat12.096Sun13.096Mon14.096Tue15.093Wed16.096Thu17.097Fri18.097Sat19.096Sun20.090-2 low3-5 moderate6-7 high8-10 very high11+ extremeworld-prices.com · 2026-09-05
Today the UV index in Buenos Aires is 6 (moderate) - unprotected fair skin can burn in about 35 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

Sea temperature - Buenos Aires

Water today
14°C
Week avg
13°C
Waves today
0.3 m
How's the water?
very cold
16-day sea temperature forecast:
5.09 14°C6.09 13°C7.09 13°C8.09 13°C9.09 13°C10.09 13°C11.09 14°C12.09 13°C13.09 13°C
Average sea temperature through the year:
Jan 27°CFeb 27°CMar 26°CApr 21°CMay 17°CJun 14°CJul 11°CAug 13°CSep 15°COct 20°CNov 23°CDec 26°C
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Air quality and smog in Buenos Aires

Air quality in Buenos Aires is currently very good. Fine particulate PM2.5: 11 µg/m³, PM10: 11.2 µg/m³.
CityPM2.5 (µg/m³)PM10 (µg/m³)Air quality
Buenos Aires1111.2very good
Based on PM2.5 thresholds. Station readings, updated daily (last reading: 2026-09-04, 22:00).

Buenos Aires weather through the year

Buenos Aires - annual climate
Upcoming public holidays in Argentina: Day of Respect for Cultural Diversity — 12 October · National Sovereignty Day — 23 November · Immaculate Conception Day — 8 December.

Nearby and related places

La PlataFray BentosTrinidadMontevideoCorrientesBahía BlancaFormosaSantiago del EsteroSan Miguel de Tucumán

FAQ - Buenos Aires weather

What is the weather like in Buenos Aires today?
Today it is about 11° during the day and 5° at night, clear sky.
How far ahead can I check the forecast for Buenos Aires?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.