<P> Sydney has 103.9 clear days annually, with the monthly percent possible sunshine ranging from 53% in January to 72% in August . Sydney's heat is predominantly dry in spring, but usually humid in the summertime, especially late summer--however, when temperatures soar over 35 ° C (95 ° F), the humidity is generally low as such high temperatures are brought by searing winds from the Australian desert . In some hot summer days, low pressure troughs would increase humidity and southerly busters would decrease temperatures by late afternoon or early evening . In late autumn and winter, east coast lows can bring large amounts of rainfall . </P> <P> Sydney experiences an urban heat island effect, making certain parts of the city more vulnerable to extreme heat, particularly the west . Efforts have been introduced to investigate and mitigate this heat effect, including increasing shade from tree canopies, adding rooftop gardens to high rise structures and changing pavement colour . The El Niño Southern Oscillation plays an important role in determining Sydney's weather patterns: drought and bushfire on the one hand, and storms and flooding on the other . Sydney is prone to heat waves and drought, which have become more common in recent years . </P> <Table> <Tr> <Th_colspan="14"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> Climate data for Sydney (Observatory Hill) </Th> </Tr> <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> Record high ° C (° F) </Th> <Td> 45.8 (114.4) </Td> <Td> 42.1 (107.8) </Td> <Td> 39.8 (103.6) </Td> <Td> 35.4 (95.7) </Td> <Td> 30.0 (86) </Td> <Td> 26.9 (80.4) </Td> <Td> 26.5 (79.7) </Td> <Td> 31.3 (88.3) </Td> <Td> 34.6 (94.3) </Td> <Td> 38.2 (100.8) </Td> <Td> 41.8 (107.2) </Td> <Td> 42.2 (108) </Td> <Td> 45.8 (114.4) </Td> </Tr> <Tr> <Th> Average high ° C (° F) </Th> <Td> 26.5 (79.7) </Td> <Td> 26.5 (79.7) </Td> <Td> 25.4 (77.7) </Td> <Td> 23.3 (73.9) </Td> <Td> 20.6 (69.1) </Td> <Td> 18.0 (64.4) </Td> <Td> 17.4 (63.3) </Td> <Td> 18.9 (66) </Td> <Td> 21.2 (70.2) </Td> <Td> 22.8 (73) </Td> <Td> 23.8 (74.8) </Td> <Td> 25.5 (77.9) </Td> <Td> 22.5 (72.5) </Td> </Tr> <Tr> <Th> Daily mean ° C (° F) </Th> <Td> 23.0 (73.4) </Td> <Td> 23.1 (73.6) </Td> <Td> 21.7 (71.1) </Td> <Td> 20.7 (69.3) </Td> <Td> 16.5 (61.7) </Td> <Td> 13.9 (57) </Td> <Td> 13.0 (55.4) </Td> <Td> 14.3 (57.7) </Td> <Td> 16.6 (61.9) </Td> <Td> 18.6 (65.5) </Td> <Td> 20.0 (68) </Td> <Td> 21.9 (71.4) </Td> <Td> 18.5 (65.3) </Td> </Tr> <Tr> <Th> Average low ° C (° F) </Th> <Td> 19.6 (67.3) </Td> <Td> 19.7 (67.5) </Td> <Td> 18.1 (64.6) </Td> <Td> 15.3 (59.5) </Td> <Td> 12.5 (54.5) </Td> <Td> 9.8 (49.6) </Td> <Td> 8.7 (47.7) </Td> <Td> 9.7 (49.5) </Td> <Td> 12.0 (53.6) </Td> <Td> 14.4 (57.9) </Td> <Td> 16.3 (61.3) </Td> <Td> 18.3 (64.9) </Td> <Td> 14.5 (58.1) </Td> </Tr> <Tr> <Th> Record low ° C (° F) </Th> <Td> 10.6 (51.1) </Td> <Td> 9.6 (49.3) </Td> <Td> 9.3 (48.7) </Td> <Td> 7.0 (44.6) </Td> <Td> 4.4 (39.9) </Td> <Td> 2.1 (35.8) </Td> <Td> 2.2 (36) </Td> <Td> 2.7 (36.9) </Td> <Td> 4.9 (40.8) </Td> <Td> 5.7 (42.3) </Td> <Td> 7.7 (45.9) </Td> <Td> 9.1 (48.4) </Td> <Td> 2.1 (35.8) </Td> </Tr> <Tr> <Th> Average rainfall mm (inches) </Th> <Td> 96.0 (3.78) </Td> <Td> 136.6 (5.378) </Td> <Td> 109.4 (4.307) </Td> <Td> 137.0 (5.394) </Td> <Td> 117.6 (4.63) </Td> <Td> 117.8 (4.638) </Td> <Td> 80.8 (3.181) </Td> <Td> 91.8 (3.614) </Td> <Td> 69.2 (2.724) </Td> <Td> 82.2 (3.236) </Td> <Td> 104.8 (4.126) </Td> <Td> 79.4 (3.126) </Td> <Td> 1,222.7 (48.138) </Td> </Tr> <Tr> <Th> Average rainy days </Th> <Td> 12.3 </Td> <Td> 12.9 </Td> <Td> 13.3 </Td> <Td> 11.1 </Td> <Td> 12.2 </Td> <Td> 10.5 </Td> <Td> 10.2 </Td> <Td> 8.4 </Td> <Td> 8.8 </Td> <Td> 11.1 </Td> <Td> 12.7 </Td> <Td> 11.2 </Td> <Td> 134.7 </Td> </Tr> <Tr> <Th> Average afternoon relative humidity (%) </Th> <Td> 61 </Td> <Td> 62 </Td> <Td> 60 </Td> <Td> 59 </Td> <Td> 58 </Td> <Td> 56 </Td> <Td> 52 </Td> <Td> 48 </Td> <Td> 50 </Td> <Td> 53 </Td> <Td> 57 </Td> <Td> 58 </Td> <Td> 56 </Td> </Tr> <Tr> <Th> Mean monthly sunshine hours </Th> <Td> 235.6 </Td> <Td> 202.4 </Td> <Td> 213.9 </Td> <Td> 207.0 </Td> <Td> 195.3 </Td> <Td> 177.0 </Td> <Td> 204.6 </Td> <Td> 244.9 </Td> <Td> 237.0 </Td> <Td> 244.9 </Td> <Td> 228.0 </Td> <Td> 244.9 </Td> <Td> 2,635.5 </Td> </Tr> <Tr> <Th> Percent possible sunshine </Th> <Td> 53 </Td> <Td> 54 </Td> <Td> 56 </Td> <Td> 61 </Td> <Td> 59 </Td> <Td> 60 </Td> <Td> 65 </Td> <Td> 72 </Td> <Td> 66 </Td> <Td> 61 </Td> <Td> 55 </Td> <Td> 55 </Td> <Td> 60 </Td> </Tr> <Tr> <Td_colspan="14"> Source #1: Bureau of Meteorology (1981--2010 averages, records 1861--) </Td> </Tr> <Tr> <Td_colspan="14"> Source #2: Bureau of Meteorology, Sydney Airport (sunshine hours) </Td> </Tr> </Table> <Tr> <Th_colspan="14"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> Climate data for Sydney (Observatory Hill) </Th> </Tr>

How cold does sydney australia get in the winter
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