UV Index Peru
According to the WHO, the average daily ambient ultraviolet radiation in Peru is 5,906 J/m² (joules per square metre).
UV radiation overview
Peru straddles the tropics between roughly 0° and 18°S on South America's Pacific coast, with the Andes running north–south and dividing the country into three classic regions: the arid costa, the high sierra and the Amazonian selva. Low tropical latitudes keep the midday sun close to the zenith year-round, so solar elevation and the resulting UV regime remain high across all three regions even outside the austral summer, according to Wikipedia's geography and climate overview of Peru.
Peru's standout feature is extreme high-altitude UV: SENAMHI's UV-index bulletins routinely report values of 12–18 over the Altiplano around Puno and Cuzco above 3,500 m, among the highest ambient UVI measurements documented worldwide, with Huaraz and the Cordillera Blanca above 4,000 m amplified further by glacier and snow albedo as described in peer-reviewed Andean UV studies. Lima and the central coast, by contrast, sit under the persistent stratus deck and 'garúa' drizzle that markedly attenuate surface UV for much of the year.
Peru sits at #6 of 191 in the WHO's global ambient-UV ranking with about 5,906 J/m² of average daily UV, around the 97th percentile worldwide.
UV Radiation in Peru
This ranks 6 out of 191 countries measured worldwide — where 1 receives the most UV radiation.
Source: WHO Global Health Observatory (1997–2003)
