Ultraviolet radiation (UV)

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