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North America

San Francisco UV index

Local Time Su Dec 22 Mo Dec 23 Tu Dec 24 We Dec 25
UV index 2 1 2 3


The strength of the sun's ultraviolet (UV) radiation is expressed as a Solar UV Index or Sun Index.The UV 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. The Sun Index forecast refers to the daily maximum.


Last updated: Su, 22 Dec, 02:48 GMT

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