21°S 140°E The Brothers – Queensland by Degrees

IN THE DEGREE SQUARE Climate: The closest representative weather station is at Mount Isa, which is 60 km to the north-west of the degree confluence, and has an elevation of 340 m. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Mean max (ºC) 36.3 35.3 34.3 31.9 27.9 24.8 24.7 27.2 31.2 34.6 36.4 37.1 31.8 Mean min (ºC) 23.8 23.4 21.8 18.5 13.9 10.1 8.6 10.3 14.3 18.6 21.4 23.1 17.3 Mean rain (mm) 118.8 99.4 62.6 15.9 12.6 6.3 6.1 4.0 6.7 19.7 35.2 70.0 459.6 The highest temperature recorded was 45.9°C in January 1990, and the lowest was -2.9°C in both July 1984. The highest rainfall in a year was 917.0 mm in 1997, and the lowest was 161.1 mm in 1970. These and other climate statistics for Mount Isa can be found at: Australian Bureau of Meteorology, http://www.bom.gov.au/climate/averages/tables/cw_029127_All.shtml. Extremes of Nature: Since 1906 there has not been any tropical cyclones to pass within 50 km of the degree confluence, although 11 have passed within 200 km, despite the area's relatively inland location. 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 experiences extreme heat for much of the year, with an average of 121 days annually that have maximum temperatures equal to or over 35°C. Despite Mount Isa's substantial average rainfall, the area only experiences 49 days a year with rain, most of which occur in the summer months. Very dry conditions prevail from April to October.

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