UV Index
UV Index
Today's UV index in San Antonio, Chile 
will be up to 3, 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: 2025-07-20
With a UV index reaching up to 3 in San Antonio, 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 San Antonio, Chile, typically ranges from moderate to high, especially during the summer months. It can reach values around 8 to 10 in December and January, indicating strong sun exposure.
San Antonio experiences warm, dry summers with temperatures averaging 25°C (77°F) and mild, wetter winters with temperatures around 10°C (50°F). Rainfall mostly occurs between May and August, while summers remain mostly dry.
Compared to other regions in Chile, San Antonio has a milder, Mediterranean climate with less extreme temperatures than northern deserts or southern Patagonia. Neighboring coastal cities share similar weather but inland areas can be hotter and drier during summer.
See the UV index hour by hour for San Antonio, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.