"Monthly Climate Statistics for 'HERON ISLAND RES STN' [039122]" "Created on [ 15 Oct 2025 14:22:17 UTC]" "039122 HERON ISLAND RES STN" "Commenced: 1956" "Last Record: 2025" "Latitude: 23.44 Degrees South" "Longitude: 151.91 Degrees East" "Elevation: 3 m" "State: QLD" "Statistic Element","January","February","March","April","May","June","July","August","September","October","November","December","Annual","Number of Years","Start Year","End Year" "Mean maximum temperature (°C) for years 1962 to 2007 ",29.8,29.5,28.7,27.0,24.4,22.2,21.5,22.6,24.6,26.5,28.0,29.1,26.2,27,1962,2007 "Highest temperature (°C) for years 1962 to 2007 ",33.9,34.0,32.9,31.8,29.3,27.0,25.6,27.8,31.1,30.6,32.2,34.7,34.7,27,1962,2007 "Date of Highest temperature °C for years 1962 to 2007 ",13 Jan 2002,08 Feb 2002,01 Mar 2002,03 Apr 2006,05 May 1973,16 Jun 2002,24 Jul 2003,04 Aug 1965,15 Sep 1965,31 Oct 1964,21 Nov 1971,18 Dec 2005,18 Dec 2005,N/A,1962,2007 "Lowest maximum temperature (°C) for years 1962 to 2007 ",22.8,24.5,23.9,22.2,17.5,17.2,15.6,17.2,18.5,21.0,23.2,23.3,15.6,27,1962,2007 "Date of Lowest maximum temperature °C for years 1962 to 2007 ",24 Jan 1966,15 Feb 2000,08 Mar 1972,12 Apr 1962,31 May 2000,14 Jun 1978,18 Jul 1966,02 Aug 1967,01 Sep 2004,08 Oct 1978,16 Nov 1974,08 Dec 1967,18 Jul 1966,N/A,1962,2007 "Decile 1 maximum temperature (°C) for years 1962 to 2007 ",27.7,27.6,26.7,25.0,22.1,19.9,18.9,20.0,22.5,24.5,26.1,27.2, ,27,1962,2007 "Decile 9 maximum temperature (°C) for years 1962 to 2007 ",31.7,31.7,30.6,28.9,26.6,24.8,23.9,24.6,26.3,28.3,29.8,31.2, ,27,1962,2007 "Mean number of days >= 30 °C for years 1962 to 2007 ",15.5,10.8,7.2,0.8,0.0,0.0,0.0,0.0,0.0,0.2,2.7,8.8,46.0,27,1962,2007 "Mean number of days >= 35 °C for years 1962 to 2007 ",0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,27,1962,2007 "Mean number of days >= 40 °C for years 1962 to 2007 ",0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,27,1962,2007 "Mean minimum temperature (°C) for years 1962 to 2007 ",24.2,24.2,23.6,21.9,19.8,17.6,16.5,17.2,18.7,20.5,22.2,23.4,20.8,27,1962,2007 "Lowest temperature (°C) for years 1962 to 2007 ",17.8,17.2,15.6,15.0,12.3,7.2,5.0,5.6,12.8,14.4,17.0,11.1,5.0,27,1962,2007 "Date of Lowest temperature °C for years 1962 to 2007 ",07 Jan 1972,11 Feb 1970,17 Mar 1964,26 Apr 1965,30 May 2000,14 Jun 1966,19 Jul 1965,14 Aug 1968,17 Sep 1970,09 Oct 1966,04 Nov 1974,05 Dec 1963,19 Jul 1965,N/A,1962,2007 "Highest minimum temperature (°C) for years 1962 to 2007 ",28.4,27.8,27.0,26.4,24.8,22.9,21.2,21.1,22.5,24.0,25.6,27.2,28.4,27,1962,2007 "Date of Highest minimum temperature °C for years 1962 to 2007 ",13 Jan 2002,11 Feb 1969,13 Mar 2007,05 Apr 2006,02 May 1973,17 Jun 2002,01 Jul 1974,29 Aug 1971,09 Sep 1999,24 Oct 2005,30 Nov 1976,29 Dec 1976,13 Jan 2002,N/A,1962,2007 "Decile 1 minimum temperature (°C) for years 1962 to 2007 ",22.2,22.2,21.7,19.9,17.2,14.5,13.8,14.5,16.3,18.3,20.5,21.6, ,27,1962,2007 "Decile 9 minimum temperature (°C) for years 1962 to 2007 ",26.0,26.1,25.3,23.9,22.2,20.0,19.0,19.5,20.6,22.2,23.9,25.5, ,27,1962,2007 "Mean number of days <= 2 °C for years 1962 to 2007 ",0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,27,1962,2007 "Mean number of days <= 0 °C for years 1962 to 2007 ",0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,27,1962,2007 "Mean daily ground minimum temperature °C for years null to null ", , , , , , , , , , , , , ,, , "Lowest ground temperature °C for years null to null ", , , , , , , , , , , , , ,, , "Date of Lowest ground temperature °C for years null to null ", , , , , , , , , , , , , ,N/A, , "Mean number of days ground min. temp. <= -1 °C for years null to null ", , , , , , , , , , , , , ,, , "Mean rainfall (mm) for years 1956 to 2007 ",103.5,138.8,109.0,111.4,107.1,115.1,78.4,49.9,29.3,40.3,52.8,91.3,1027.8,48,1956,2007 "Highest rainfall (mm) for years 1956 to 2007 ",379.7,575.2,320.1,736.6,312.9,724.0,500.1,149.0,122.4,184.1,176.2,308.7,1727.7,48,1956,2007 "Date of Highest rainfall for years 1956 to 2007 ",1974,1980,1976,1990,1989,1967,1973,2002,1998,1969,2000,1958,1967,N/A,1956,2007 "Lowest rainfall (mm) for years 1956 to 2007 ",3.6,6.2,8.6,13.0,26.4,0.0,0.0,0.0,0.0,0.0,1.0,3.7,718.4,48,1956,2007 "Date of Lowest rainfall for years 1956 to 2007 ",2003,1983,2001,1969,2001,1965,1956,1976,1991,1956,1958,1972,2005,N/A,1956,2007 "Decile 1 monthly rainfall (mm) for years 1800 to 3000 ",27.5,41.0,30.9,34.3,47.5,35.0,7.6,4.6,1.8,4.6,14.1,23.3, ,50,n/a,n/a "Decile 5 (median) monthly rainfall (mm) for years 1800 to 3000 ",64.8,94.0,85.0,84.2,103.4,84.2,68.4,43.4,19.0,27.4,37.8,75.0, ,50,n/a,n/a "Decile 5 (median) monthly rainfall (mm) for years 1800 to 3000 ",230.7,271.8,261.4,179.6,165.8,224.0,132.4,103.9,63.4,93.2,111.5,192.0, ,50,n/a,n/a "Highest daily rainfall (mm) for years 1956 to 2007 ",191.2,282.4,159.8,167.4,87.1,250.2,165.1,55.7,91.8,81.2,130.6,158.0,282.4,47,1956,2007 "Date of Highest daily rainfall for years 1956 to 2007 ",11 Jan 1993,21 Feb 1992,04 Mar 1983,03 Apr 1990,20 May 1971,21 Jun 1967,26 Jul 1973,29 Aug 1978,01 Sep 2006,23 Oct 1976,18 Nov 1961,17 Dec 1958,21 Feb 1992,N/A,1956,2007 "Mean number of days of rain for years 1956 to 2007 ",11.5,13.7,13.8,14.7,14.0,11.3,10.1,8.3,6.6,7.3,7.7,9.5,128.5,48,1956,2007 "Mean number of days of rain >= 1 mm for years 1956 to 2007 ",7.9,9.3,9.3,10.1,9.8,7.5,6.7,5.1,3.5,4.3,4.7,6.5,84.7,47,1956,2007 "Mean number of days of rain >= 10 mm for years 1956 to 2007 ",2.6,2.8,2.7,2.9,2.6,2.6,2.1,1.5,0.8,1.1,1.3,2.4,25.4,47,1956,2007 "Mean number of days of rain >= 25 mm for years 1956 to 2007 ",1.0,1.3,1.1,0.9,0.9,1.1,0.7,0.4,0.2,0.3,0.5,1.1,9.5,47,1956,2007 "Mean daily wind run (km) for years 1999 to 2024 ",536,569,554,559,535,543,513,494,466,487,489,516,522,19,1999,2024 "Maximum wind gust speed (km/h) for years 1978 to 2025 ",113,163,104,98,93,89,91,97,84,102,104,96,163,28,1978,2025 "Date of Maximum wind gust speed for years 1978 to 2025 ",25 Jan 2015,,09 Mar 2009,14 Apr 2014,10 May 2017,25 Jun 2000,24 Jul 2008,23 Aug 2000,11 Sep 2006,20 Oct 2001,,13 Dec 2020,,N/A,1978,2025 "Mean daily sunshine (hours) for years 1962 to 1979 ",8.2,8.1,7.3,8.1,7.5,7.5,8.0,8.3,9.1,9.5,9.6,9.3,8.4,16,1962,1979 "Mean daily solar exposure (MJ/(m*m)) for years null to null ", , , , , , , , , , , , , ,, , "Mean number of clear days for years 1962 to 2003 ",8.9,5.3,5.9,7.7,9.6,12.1,13.8,15.3,14.7,14.2,11.6,11.2,130.3,18,1962,2003 "Mean number of cloudy days for years 1962 to 2003 ",9.5,9.1,9.5,6.7,8.2,7.4,5.0,4.9,3.6,3.6,4.5,6.2,78.2,18,1962,2003 "Mean daily evaporation (mm) for years null to null ", , , , , , , , , , , , , ,, , "Mean 9am temperature (°C) for years 1962 to 2007 ",27.7,27.4,26.7,24.9,22.4,20.1,19.1,20.0,22.1,24.3,25.9,27.1,24.0,27,1962,2007 "Mean 9am wet bulb temperature (°C) for years 1962 to 2007 ",23.8,23.9,23.2,21.4,19.1,17.0,16.1,16.7,18.3,20.3,21.9,23.1,20.4,25,1962,2007 "Mean 9am dew point temperature (°C) for years 1962 to 2007 ",22.0,22.2,21.4,19.4,17.0,15.0,13.7,14.0,15.5,17.6,19.6,20.9,18.2,26,1962,2007 "Mean 9am relative humidity (%) for years 1962 to 2007 ",72,74,73,72,73,73,72,69,67,67,69,70,71,26,1962,2007 "Mean 9am cloud cover (okas) for years 1962 to 2007 ",4.6,4.9,4.7,4.3,4.2,4.0,3.2,3.0,2.7,3.2,3.5,3.9,3.8,26,1962,2007 "Mean 9am wind speed (km/h) for years 1962 to 2010 ",20.3,22.1,23.1,23.8,24.2,24.3,24.6,21.8,18.9,18.4,17.8,18.1,21.5,29,1962,2010 "Mean 3pm temperature (°C) for years 1962 to 2007 ",28.3,28.1,27.2,25.5,23.2,21.0,20.1,21.3,23.0,24.7,26.3,27.5,24.7,27,1962,2007 "Mean 3pm wet bulb temperature (°C) for years 1962 to 2007 ",24.0,24.0,23.4,21.5,19.4,17.4,16.4,17.2,18.6,20.4,21.9,23.2,20.6,24,1962,2007 "Mean 3pm dew point temperature (°C) for years 1962 to 2007 ",21.9,22.2,21.4,19.2,16.7,14.8,13.5,13.9,15.3,17.5,19.5,20.9,18.1,26,1962,2007 "Mean 3pm relative humidity (%) for years 1962 to 2007 ",69,71,71,69,68,69,67,64,63,65,67,68,68,26,1962,2007 "Mean 3pm cloud cover (oktas) for years 1962 to 2003 ",3.9,4.6,4.5,3.8,3.7,3.1,2.8,2.4,2.4,2.8,2.9,3.2,3.3,18,1962,2003 "Mean 3pm wind speed (km/h) for years 1962 to 2010 ",22.0,23.3,24.3,23.1,21.3,20.8,20.7,17.8,17.2,18.9,19.5,19.8,20.7,28,1962,2010