<Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Average sea temperature ° C (° F) </Th> <Td> 19.1 (66.4) </Td> <Td> 18.9 (66.0) </Td> <Td> 20.1 (68.2) </Td> <Td> 22.7 (72.9) </Td> <Td> 26.8 (80.2) </Td> <Td> 28.5 (83.3) </Td> <Td> 29.1 (84.4) </Td> <Td> 28.6 (83.5) </Td> <Td> 28.3 (82.9) </Td> <Td> 26.5 (79.7) </Td> <Td> 24.3 (75.7) </Td> <Td> 21.0 (69.8) </Td> <Td> 24.5 (76.1) </Td> </Tr> <Tr> <Th> Mean daily daylight hours </Th> <Td> 11.0 </Td> <Td> 11.0 </Td> <Td> 12.0 </Td> <Td> 13.0 </Td> <Td> 13.0 </Td> <Td> 13.0 </Td> <Td> 13.0 </Td> <Td> 13.0 </Td> <Td> 12.0 </Td> <Td> 12.0 </Td> <Td> 11.0 </Td> <Td> 11.0 </Td> <Td> 12.1 </Td> </Tr> <Tr> <Th> Average Ultraviolet index </Th> <Td> 7 </Td> <Td> 9 </Td> <Td> 11 </Td> <Td> 11 + </Td> <Td> 11 + </Td> <Td> 11 + </Td> <Td> 11 + </Td> <Td> 11 + </Td> <Td> 11 </Td> <Td> 9 </Td> <Td> 7 </Td> <Td> 7 </Td> <Td> 9.7 </Td> </Tr>

Is hong kong a city or a country