UV Index
UV Index
Today's UV index in Buenos Aires, Argentina 
will be up to 3.8, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-09
With a UV index reaching up to 3.8 in Buenos Aires, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Buenos Aires ranges from low in winter to very high in summer, often reaching values around 10 or more during December and January.
Buenos Aires has hot summers with temperatures around 30°C (86°F) and mild winters averaging 10-15°C (50-59°F). Rainfall is spread throughout the year but is slightly higher in spring and summer.
Compared to other parts of Argentina, Buenos Aires is warmer and more humid than the Andes region. It is milder and wetter than the dry and hot areas in northern Argentina and similar to the coastal climate of Uruguay nearby.
See the UV index hour by hour for Buenos Aires, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.