UV index at 11.1 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.
Read more here about the climate and sun exposure in and around Santiago.
The UV index in Santiago, Chile can be quite high, especially during the summer months. On average, the UV index ranges from 6 to 11 (high to extreme), indicating a significant risk of sunburn. It is important to protect your skin by wearing sunscreen, sunglasses, and a hat when spending time outside.
Santiago experiences four distinct seasons throughout the year. Summer, from December to February, brings hot temperatures reaching around 30 °C (86 °F). Autumn, from March to May, is mild with temperatures ranging from 10 to 22 °C (50 to 72 °F). Winter, from June to August, can be cold, with temperatures averaging between 3 and 14 °C (37 to 57 °F). Finally, spring, from September to November, is a pleasant season with temperatures ranging from 12 to 24 °C (54 to 75 °F).
Compared to its region, Santiago enjoys a higher level of sun exposure. The city is situated in a valley surrounded by the Andes Mountains, which can amplify the sunlight. As a result, Santiago receives about 2,720 hours of sunshine per year, making it one of the sunniest capitals in South America. However, this also means higher levels of UV radiation and a need for increased sun protection measures.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Santiago. It's designed to provide you with a better understanding of the yearly weather and sun exposure.