Ultraviolet radiation and the INTERSUN Programme

UV Index


UV measurements

UV radiation levels vary substantially with time and place. The increased risk of UV damage to the skin and eye during a holiday in a sunny location is often underestimated.

The table below illustrates the changes in UV radiation levels with season and latitude. Maximal UV Index values are given for a range of cities in different countries, calculated for the 21st of each month.

The UV Index Worldwide


Country (City) . J F M A M J J A S O N D
Argentine (Buenos Aires) 35°S  9 9 7 4 3 2 2 4 5 7 9 10
Australia (Darwin) 13°S 12 13 12 10 8 8 8 10 11 13 12 12
Australia (Melbourne) 37°S 8 8 6 4 2 2 2 3 5 6 8 9
Australia (Sydney) 34°S 9 9 7 5 3 2 3 4 6 7 9 10
Brazil (Rio de Janeiro) 23°S 12 11 9 7 5 5 5 7 9 10 12 12
Canada (Vancouver) 49°N 1 1 3 4 6 7 7 6 4 2 1 1
Cuba (Havana) 23°N 6 8 9 10 10 11 12 11 10 8 6 5
Falkland-Islands (Port Stanley) 58°S 5 4 2 1 0 0 0 1 2 3 5 5
France (Paris) 49°N 1 1 3 4 6 7 7 6 4 2 1 0
Germany (Berlin) 52°N 1 1 2 4 5 7 7 5 3 1 1 0
Greece (Iraklion) 35°N 3 4 5 8 9 9 10 9 7 4 3 2
Japan (TokYo) 36°N 2 4 5 8 9 9 10 9 7 4 2 2
Kenya (Nairobi) 1°S 12 13 13 12 11 10 11 11 12 12 12 11
Madagascar (Tananarive) 19°S 12 12 11 9 7 6 6 8 11 11 12 12
Mozambique (Maputo) 26°S 11 11 9 7 5 4 4 6 8 10 11 11
Mongolia (Ulan Bator) 48°N 1 2 3 5 6 7 8 6 4 2 1 1
New Zealand (Wellington) 42°S 7 7 5 3 1 1 1 2 4 6 7 8
Panama (Panama) 9°N 9 11 12 12 11 11 12 12 12 11 9 9
Russia (St Petersburg) 60°N 0 0 1 3 4 5 5 4 2 1 0 0
Singapore (Singapore) 1°N 11 12 13 13 11 11 11 11 12 12 11 10
South Africa (Cape Town) 34°S 9 9 7 5 3 2 3 4 6 7 9 10
Spain (Palma de Mallorca) 39°N 2 3 4 6 8 9 9 8 6 4 2 1
Sri Lanka (Colombo) 13°N 8 10 12 12 11 11 12 12 12 10 8 8
Thailand (Bangkok) 14°N 8 10 12 12 11 12 12 12 11 10 8 8
USA (Los Angeles) 34°N 3 4 6 8 9 10 10 9 7 5 3 2
USA (New York) 41°N 2 3 4 6 7 8 9 8 6 3 2 1
Vietnam (Hanoi) 21°N 6 8 10 11 11 11 12 12 10 8 6 6
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