UV Index Forecast
Solar UV symbols |
The strength of the sun's ultraviolet (UV) radiation is
expressed as a 'Solar UV Index', a system developed by the
World Health Organization. These forecasts include
the effects of:
- the position of the sun in the sky;
- forecast cloud cover;
- ozone amounts in the stratosphere.
The solar index does not exceed 8 in the UK (8 is rare; 7 may occur on exceptional days, mostly in the two weeks around the summer solstice). Indices of 9 and 10 are common in the Mediterranean area.
UV Index |
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Exposure category |
Low |
Moderate |
High |
Very high |
Extreme |
Protection required |
None. You can safely stay outside. |
Seek shade during midday hours, cover up and wear sunscreen. |
Avoid being outside during midday hours. Shirt, sunscreen and hat essential. |
More about enjoying the sun safely, coming soon |
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Page updated 11-11-2020