22°S 147°E Twin Hills – Queensland by Degrees

IN THE DEGREE SQUARE The Climate: The area has a typical sub-tropical and sub-humid climate that has wet and hot, dry and cool seasons with a high degree of variability. The climate is greatly influenced by the trade wind belt. The closest weather station to the confluence is at the Moranbah Water Treatment Plant, which is 106 km to the east, and has an elevation of 260 m. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Mean max (ºC) 34.0 33.3 32.4 29.6 26.6 23.6 23.7 25.4 29.2 32.4 33.1 33.9 29.8 Mean min (ºC) 21.9 21.8 20.3 17.7 14.6 11.2 9.8 11.0 14.0 17.7 19.5 21.1 16.7 Mean rain (mm) 100.2 94.3 48.7 37.5 37.8 23.5 16.9 23.7 8.1 37.8 68.9 99.2 596.4 The highest temperature recorded was 45.0°C in January 1994, and the lowest was 0.2°C in July 1990. The greatest rainfall recorded in a year was 1 009.6 mm in 2000, and the least was 280.7 mm in 1982. These and other climate statistics for Moranbah can be found at: Australian Bureau of Meteorology, http://www.bom.gov.au/climate/averages/tables/cw_034038_All.shtml. Extremes of Nature: The area has been subjected to a number of cyclones since recording began in 1906, due to its tropical location. There have been five cyclones to pass within 50 km of the degree confluence, and a further 16 have passed within 200 km. Cyclone information for this area and all of Australia can be found at the Australian Bureau of Meteorology website, http://www.bom.gov.au/cgi-bin/silo/cyclones.cgi. Cyclone tracks within 200 km of point 1906 to 2006 (Bureau of Meteorology web site) The area can also experience extreme heat throughout much of the year, with Moranbah having an average of 52 days annually that have maximum temperatures equal to or over 35°C. Compilers: Ray Kelly

Last updated 9 October 2009. For more information email admin@rgsq.org.au Return to home