<Tr> <Th> Average relative humidity (%) </Th> <Td> 59.8 </Td> <Td> 57.9 </Td> <Td> 57.8 </Td> <Td> 56.2 </Td> <Td> 62.7 </Td> <Td> 68.1 </Td> <Td> 78.3 </Td> <Td> 75.6 </Td> <Td> 69.2 </Td> <Td> 64.0 </Td> <Td> 62.0 </Td> <Td> 60.6 </Td> <Td> 64.4 </Td> </Tr> <Tr> <Th> Mean monthly sunshine hours </Th> <Td> 160.3 </Td> <Td> 163.3 </Td> <Td> 189.0 </Td> <Td> 205.0 </Td> <Td> 213.0 </Td> <Td> 182.0 </Td> <Td> 120.0 </Td> <Td> 152.5 </Td> <Td> 176.2 </Td> <Td> 198.8 </Td> <Td> 153.2 </Td> <Td> 152.6 </Td> <Td> 2,066 </Td> </Tr> <Tr> <Th> Percent possible sunshine </Th> <Td> 52.3 </Td> <Td> 53.6 </Td> <Td> 51.0 </Td> <Td> 51.9 </Td> <Td> 48.4 </Td> <Td> 41.2 </Td> <Td> 26.8 </Td> <Td> 36.2 </Td> <Td> 47.2 </Td> <Td> 57.1 </Td> <Td> 50.2 </Td> <Td> 51.1 </Td> <Td> 46.4 </Td> </Tr> <Tr> <Td_colspan="14"> Source: Korea Meteorological Administration (percent sunshine and snowy days) </Td> </Tr>

What is the average winter temperature in north korea