Weather in Buenos Aires
Live weather and 7-day forecast for Buenos Aires, Argentina, followed by what to expect in each month of the year.
Sunrise 06:04 Sunset 19:14 Daylight 13h 10m Sun times →
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Forecast data from Open-Meteo
Climate in Buenos Aires: month by month
Averaged over 2023–2025, the warmest month in Buenos Aires is January, with highs around 29 °C (85 °F) and lows around 22 °C (71 °F); the coolest is July, with highs around 14 °C (58 °F) and lows around 7 °C (45 °F).
Buenos Aires gets about 1,085 mm (43 in) of precipitation a year. The wettest month is March (223 mm over about 10 days) and the driest is July (35 mm).
| Month | Avg high | Avg low | Precipitation (mm) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 29° | 22° | 45 | 7 | 14h 13m |
| February | 29° | 22° | 76 | 7 | 13h 20m |
| March | 27° | 20° | 223 | 10 | 12h 20m |
| April | 21° | 14° | 113 | 9 | 11h 14m |
| May | 18° | 11° | 109 | 7 | 10h 20m |
| June | 15° | 9° | 38 | 7 | 9h 51m |
| July | 14° | 7° | 35 | 5 | 10h 3m |
| August | 16° | 9° | 112 | 7 | 10h 49m |
| September | 19° | 11° | 56 | 5 | 11h 51m |
| October | 23° | 14° | 78 | 8 | 12h 56m |
| November | 25° | 17° | 117 | 10 | 13h 55m |
| December | 28° | 19° | 83 | 9 | 14h 27m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Buenos Aires's coordinates (model elevation 18 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Buenos Aires
What is the hottest month in Buenos Aires?
January, with average highs of 29 °C (85 °F) and lows of 22 °C (71 °F) over 2023–2025. The coolest month is July, averaging 14 °C (58 °F) by day and 7 °C (45 °F) at night.
What is the rainiest month in Buenos Aires?
March, with about 223 mm of precipitation on roughly 10 days. The driest month is July (35 mm), and the yearly total is around 1,085 mm.
When is the weather mildest in Buenos Aires?
Going by the averages, March–April and September–November are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. March is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Buenos Aires local time (America/Argentina/Buenos_Aires).