5-day weather forecast Buenos Aires Sep 18, 2026
18°Weather forecast Buenos Aires Friday Sep 18, 2026: overcast, temperature from 12 °C to 18 °C.
Precipitation probability 27%. Wind up to 4.61 m/s (gusts 9.03 m/s). Air humidity 52–86%, atmospheric pressure 764–767 mm Hg, UV index up to 6.
5 days at a glance — tap a day to open it
Sunrise 06:48
Sunset 18:46
Sunset 18:46
First Quarter53% illuminated
Moonrise 11:25 · Moonset 01:56
Moonrise 11:25 · Moonset 01:56
Chart
TableFri, Sep 18, 2026
Forecast from 12 °C to 18 °C and precipitation
Cloud cover and precipitation probability
Wind speed and direction
Air humidity
Atmospheric pressure
Ultraviolet index
Air quality & pollen
Air quality is available for the first three days only.
Fri, Sep 18, 2026
Buenos Aires on the map
Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.