São Sebastião UV Index

São Sebastião, Brazil experiences consistently high UV radiation throughout the year due to its proximity to the equator at latitude 9.9°S. The annual average UV index is 12.3, which the World Health Organization classifies as extreme. Sun protection is recommended year-round in São Sebastião.

The highest UV levels in São Sebastião occur in February, when the UV index reaches 14 (extreme). During this period, unprotected skin can burn in as little as 10 minutes during peak hours (11am to 3pm). SPF 50+ sunscreen, protective clothing, and seeking shade are strongly recommended.

The lowest UV levels occur in May, with an average UV index of 10 (very high). Even during this period, UV levels are still significant and basic sun protection is advisable for prolonged outdoor exposure.

The World Health Organization recommends sun protection measures when the UV index is 3 or above. In São Sebastião, the UV index exceeds this threshold for 12 months of the year. For 12 months, the UV index reaches "very high" or "extreme" levels, requiring extra precautions.