San Julián UV Index

San Julián, Argentina experiences significant seasonal variation in UV radiation at latitude 49.3°S. The UV index ranges from 3 in May to 10 in January, with an annual average of 6.3. This variation follows the pattern typical of mid-latitude cities.

The highest UV levels in San Julián occur in January, when the UV index reaches 10 (very high). During this period, unprotected skin can burn in as little as 15-20 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 3 (moderate). Even during this period, UV levels are moderate 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 San Julián, the UV index exceeds this threshold for 12 months of the year. For 5 months, the UV index reaches "very high" or "extreme" levels, requiring extra precautions.