<P> Brisbane also lies in the Tropical Cyclone risk area, although cyclones are rare . The last to affect Brisbane was Severe Tropical Cyclone Debbie in March 2017: It drenched parts of Brisbane with rain amounts reaching as much as 100mm in a 24 - hour period . The monthly total was at 298mm compared to the average of 104mm and the 2001 record of 248mm . The city is susceptible to severe thunderstorms in the spring and summer months; on 16 November 2008 a severe storm caused tremendous damage in the outer suburbs, most notably The Gap . Roofs were torn off houses and hundreds of trees were felled . More recently, on 27 November 2014, a very strong storm made a direct hit on the city centre . Described as' the worst storm in a decade,' very large hail, to the size of cricket balls, smashed skyscraper windows while a flash flood tore through the CBD . Wind gusts of 141 km / h (88 mph) were recorded in some suburbs, many houses were severely damaged, cars were destroyed and planes were flipped at the Brisbane and Archerfield Airports . Dust storms in Brisbane are extremely rare; on 23 September 2009, however, a severe dust storm blanketed Brisbane, as well as other parts of eastern Australia . </P> <P> The average annual temperature of the sea ranges from 21.0 ° C (69.8 ° F) in July to 27.0 ° C (80.6 ° F) in February . </P> <Table> <Tr> <Th_colspan="14"> (hide) Climate data for Brisbane (1999--2017) </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> 40.0 (104) </Td> <Td> 41.7 (107.1) </Td> <Td> 37.9 (100.2) </Td> <Td> 33.7 (92.7) </Td> <Td> 30.7 (87.3) </Td> <Td> 29.0 (84.2) </Td> <Td> 28.2 (82.8) </Td> <Td> 35.4 (95.7) </Td> <Td> 37.0 (98.6) </Td> <Td> 38.7 (101.7) </Td> <Td> 38.9 (102) </Td> <Td> 40.0 (104) </Td> <Td> 41.7 (107.1) </Td> </Tr> <Tr> <Th> Average high ° C (° F) </Th> <Td> 30.3 (86.5) </Td> <Td> 30.0 (86) </Td> <Td> 29.0 (84.2) </Td> <Td> 27.4 (81.3) </Td> <Td> 24.5 (76.1) </Td> <Td> 21.9 (71.4) </Td> <Td> 21.9 (71.4) </Td> <Td> 23.2 (73.8) </Td> <Td> 25.6 (78.1) </Td> <Td> 27.1 (80.8) </Td> <Td> 28.2 (82.8) </Td> <Td> 29.4 (84.9) </Td> <Td> 26.5 (79.7) </Td> </Tr> <Tr> <Th> Average low ° C (° F) </Th> <Td> 21.5 (70.7) </Td> <Td> 21.3 (70.3) </Td> <Td> 20.0 (68) </Td> <Td> 17.4 (63.3) </Td> <Td> 13.7 (56.7) </Td> <Td> 11.8 (53.2) </Td> <Td> 10.2 (50.4) </Td> <Td> 10.8 (51.4) </Td> <Td> 13.8 (56.8) </Td> <Td> 16.2 (61.2) </Td> <Td> 18.8 (65.8) </Td> <Td> 20.4 (68.7) </Td> <Td> 16.3 (61.3) </Td> </Tr> <Tr> <Th> Record low ° C (° F) </Th> <Td> 17.0 (62.6) </Td> <Td> 16.5 (61.7) </Td> <Td> 12.2 (54) </Td> <Td> 10.0 (50) </Td> <Td> 5.0 (41) </Td> <Td> 5.0 (41) </Td> <Td> 2.6 (36.7) </Td> <Td> 4.1 (39.4) </Td> <Td> 7.0 (44.6) </Td> <Td> 8.8 (47.8) </Td> <Td> 10.8 (51.4) </Td> <Td> 14.0 (57.2) </Td> <Td> 2.6 (36.7) </Td> </Tr> <Tr> <Th> Average rainfall mm (inches) </Th> <Td> 151.8 (5.976) </Td> <Td> 142.5 (5.61) </Td> <Td> 109.7 (4.319) </Td> <Td> 67.4 (2.654) </Td> <Td> 67.9 (2.673) </Td> <Td> 68.4 (2.693) </Td> <Td> 24.0 (0.945) </Td> <Td> 40.6 (1.598) </Td> <Td> 31.6 (1.244) </Td> <Td> 69.0 (2.717) </Td> <Td> 100.1 (3.941) </Td> <Td> 131.0 (5.157) </Td> <Td> 1,021.6 (40.22) </Td> </Tr> <Tr> <Th> Average precipitation days </Th> <Td> 12.2 </Td> <Td> 13.3 </Td> <Td> 14.2 </Td> <Td> 11.7 </Td> <Td> 9.5 </Td> <Td> 9.7 </Td> <Td> 7.3 </Td> <Td> 6.0 </Td> <Td> 7.8 </Td> <Td> 8.7 </Td> <Td> 11.3 </Td> <Td> 13.3 </Td> <Td> 125.0 </Td> </Tr> <Tr> <Th> Average afternoon relative humidity (%) </Th> <Td> 57 </Td> <Td> 59 </Td> <Td> 57 </Td> <Td> 54 </Td> <Td> 49 </Td> <Td> 52 </Td> <Td> 44 </Td> <Td> 43 </Td> <Td> 48 </Td> <Td> 51 </Td> <Td> 56 </Td> <Td> 57 </Td> <Td> 52.3 </Td> </Tr> <Tr> <Th> Mean monthly sunshine hours </Th> <Td> 263.5 </Td> <Td> 223.2 </Td> <Td> 232.5 </Td> <Td> 234.0 </Td> <Td> 235.6 </Td> <Td> 198.0 </Td> <Td> 238.7 </Td> <Td> 266.6 </Td> <Td> 270.0 </Td> <Td> 275.9 </Td> <Td> 270.0 </Td> <Td> 260.4 </Td> <Td> 2,968.4 </Td> </Tr> <Tr> <Td_colspan="14"> Source: Bureau of Meteorology . </Td> </Tr> </Table> <Tr> <Th_colspan="14"> (hide) Climate data for Brisbane (1999--2017) </Th> </Tr>

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