UV Index
UV Index
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Today's UV index in Santiago, Chile 
will be up to 11.2, indicating a extreme level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
UV index at 11.2 in Santiago means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.
The UV index in Santiago, Chile, is often high due to its location near the southern hemisphere's mid-latitudes. On clear days, the index can reach extreme levels, posing health risks for those overexposed to sunlight.
Santiago experiences four distinct seasons: a mild, wet spring and autumn, a hot and dry summer, and a cold, snowy winter. The Andes Mountains to the east significantly influence the city's climate.
Compared to its region and neighboring countries, Santiago's weather is relatively mild. The city has less rainfall and cooler temperatures than many other areas in Chile, and it's warmer and drier than cities in Argentina and Bolivia at similar latitudes.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Santiago. It's designed to provide you with a better understanding of the yearly weather and sun exposure.