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Climate statistics for Australian locations
Monthly climate statistics
All years of record
ONSLOW
An extended list of climate statistics recorded is provided below. There is also a summary table for printing with the commonly requested statistics and a map showing the location of this site. Monthly statistics are only included if there are more than 10 years of suitable data.
Note: Many statistics are updated quarterly and recent weather events may not be represented in the statistics below. For more current information on recent extreme values, please refer to the corresponding Daily rainfall, Maximum temperature and Minimum temperature data tables for this site, and our Australian Climate and Weather Extremes Monitoring System. Missing observations associated with the observer being unavailable (where observations are undertaken manually), a failure in the observing equipment, or when an event has produced suspect data may result in an extreme event not being recorded.Site details
| Site name: ONSLOW | Site number: 005016 | Commenced: 1886 | Map | |
| Latitude: 21.64° S | Longitude: 115.11° E | Elevation: 4 m | Operational status: Closed 20 Jul 2012 | |
| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
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| Temperature | |||||||||||||||||
| Maximum temperature | |||||||||||||||||
| Mean maximum temperature (°C) | 35.7 | 35.5 | 35.4 | 33.2 | 28.9 | 25.5 | 24.8 | 26.6 | 29.1 | 31.7 | 33.8 | 35.2 | 31.3 | 121 | 1887 2012 |
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| Highest temperature (°C) | 49.2 | 48.3 | 46.2 | 43.3 | 39.0 | 32.7 | 32.2 | 35.5 | 39.0 | 44.7 | 45.5 | 48.7 | 49.2 | 52 | 1957 2012 |
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| Date | 01 Jan 2010 | 03 Feb 1959 | 07 Mar 1980 | 01 Apr 1970 | 01 May 1990 | 08 Jun 1985 | 08 Jul 1959 | 28 Aug 2011 | 25 Sep 2009 | 16 Oct 1981 | 27 Nov 2007 | 22 Dec 2011 | 01 Jan 2010 | ||||
| Lowest maximum temperature (°C) | 27.2 | 24.2 | 23.9 | 23.2 | 15.6 | 17.5 | 17.0 | 18.3 | 18.9 | 21.8 | 25.5 | 27.1 | 15.6 | 52 | 1957 2012 |
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| Date | 21 Jan 1967 | 05 Feb 1993 | 22 Mar 1965 | 07 Apr 2006 | 05 May 1970 | 09 Jun 2001 | 08 Jul 1998 | 13 Aug 1960 | 10 Sep 1970 | 14 Oct 1975 | 01 Nov 1975 | 06 Dec 1998 | 05 May 1970 | ||||
| Decile 1 maximum temperature (°C) | 31.0 | 31.6 | 31.7 | 29.8 | 25.8 | 23.3 | 22.5 | 24.1 | 25.7 | 27.2 | 28.6 | 29.9 | 51 | 1957 2012 |
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| Decile 9 maximum temperature(°C) | 41.6 | 40.1 | 39.4 | 36.8 | 32.5 | 28.3 | 27.7 | 29.7 | 33.0 | 36.9 | 38.9 | 40.1 | 51 | 1957 2012 |
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| Mean number of days ≥ 30 °C | 29.8 | 26.7 | 29.2 | 26.1 | 11.2 | 0.6 | 0.6 | 2.6 | 10.5 | 19.4 | 22.9 | 27.3 | 206.9 | 52 | 1957 2012 |
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| Mean number of days ≥ 35 °C | 13.8 | 12.0 | 14.8 | 6.9 | 0.7 | 0.0 | 0.0 | 0.0 | 1.3 | 5.9 | 9.6 | 12.2 | 77.2 | 52 | 1957 2012 |
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| Mean number of days ≥ 40 °C | 4.7 | 2.9 | 2.5 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.9 | 2.0 | 3.4 | 16.8 | 52 | 1957 2012 |
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| Minimum temperature | |||||||||||||||||
| Mean minimum temperature (°C) | 23.7 | 24.3 | 23.3 | 20.4 | 16.3 | 13.3 | 11.7 | 12.5 | 14.2 | 16.7 | 19.3 | 21.6 | 18.1 | 121 | 1887 2012 |
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| Lowest temperature (°C) | 16.6 | 15.1 | 16.9 | 10.9 | 8.9 | 3.1 | 4.6 | 5.4 | 7.9 | 8.9 | 12.9 | 15.6 | 3.1 | 51 | 1957 2012 |
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| Date | 04 Jan 2007 | 02 Feb 1979 | 28 Mar 2001 | 29 Apr 1968 | 27 May 1960 | 30 Jun 1958 | 21 Jul 1961 | 10 Aug 1968 | 11 Sep 1969 | 06 Oct 1964 | 09 Nov 1962 | 05 Dec 1984 | 30 Jun 1958 | ||||
| Highest minimum temperature (°C) | 31.6 | 31.7 | 31.1 | 27.8 | 27.8 | 22.6 | 21.2 | 21.8 | 22.0 | 26.0 | 27.9 | 29.4 | 31.7 | 51 | 1957 2012 |
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| Date | 21 Jan 2003 | 21 Feb 1992 | 22 Mar 1959 | 02 Apr 1985 | 03 May 1959 | 04 Jun 1957 | 15 Jul 1996 | 14 Aug 2011 | 13 Sep 1981 | 17 Oct 1981 | 25 Nov 2006 | 17 Dec 1970 | 21 Feb 1992 | ||||
| Decile 1 minimum temperature (°C) | 21.5 | 22.3 | 20.8 | 18.1 | 13.7 | 10.7 | 9.1 | 10.2 | 12.5 | 15.0 | 17.0 | 19.2 | 51 | 1957 2012 |
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| Decile 9 minimum temperature (°C) | 27.2 | 27.6 | 27.0 | 24.8 | 21.2 | 18.9 | 17.0 | 16.9 | 18.0 | 20.8 | 23.0 | 25.6 | 51 | 1957 2012 |
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| Mean number of days ≤ 2 °C | 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 | 51 | 1957 2012 |
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| Mean number of days ≤ 0 °C | 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 | 51 | 1957 2012 |
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| Ground surface temperature | |||||||||||||||||
| Mean daily ground minimum temperature (°C) | 22.5 | 23.7 | 22.3 | 19.4 | 14.7 | 12.0 | 9.9 | 11.0 | 13.1 | 15.2 | 17.9 | 20.1 | 16.8 | 13 | 1975 1990 |
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| Lowest ground temperature (°C) | 12.5 | 15.9 | 14.8 | 12.2 | 5.6 | 2.8 | -0.2 | 2.3 | 6.8 | 7.0 | 10.4 | 12.6 | -0.2 | 13 | 1975 1990 |
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| Date | 12 Jan 1979 | 22 Feb 1980 | 28 Mar 1976 | 22 Apr 1986 | 29 May 1977 | 15 Jun 1978 | 30 Jul 1981 | 13 Aug 1986 | 22 Sep 1978 | 04 Oct 1981 | 21 Nov 1981 | 03 Dec 1981 | 30 Jul 1981 | ||||
| Mean number of days ground min. temp. ≤ -1 °C | 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 | 13 | 1975 1990 |
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| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
| Rainfall | |||||||||||||||||
| Mean rainfall (mm) | 28.3 | 52.2 | 49.0 | 20.1 | 45.5 | 44.2 | 18.4 | 8.6 | 1.3 | 0.8 | 1.5 | 5.3 | 275.8 | 123 | 1886 2012 |
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| Highest rainfall (mm) | 261.1 | 544.6 | 414.8 | 279.4 | 393.7 | 226.8 | 221.5 | 106.9 | 24.7 | 26.6 | 56.4 | 119.2 | 997.9 | 123 | 1886 2012 |
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| Date | 1909 | 1995 | 1934 | 1900 | 1998 | 1986 | 1904 | 1889 | 1970 | 1975 | 1949 | 1995 | 1961 | ||||
| Lowest rainfall (mm) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 14.5 | 123 | 1886 2012 |
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| Date | 2008 | 2010 | 2010 | 2012 | 2012 | 2007 | 2012 | 2011 | 2011 | 2011 | 2011 | 2011 | 1912 | ||||
| Decile 1 rainfall (mm) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 124 | n/a n/a |
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| Decile 5 (median) rainfall (mm) | 6.4 | 11.5 | 15.2 | 2.3 | 20.0 | 29.3 | 9.3 | 1.9 | 0.0 | 0.0 | 0.0 | 0.0 | 124 | n/a n/a |
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| Decile 9 rainfall (mm) | 82.4 | 165.4 | 143.7 | 56.3 | 104.7 | 103.3 | 45.4 | 24.9 | 4.1 | 1.8 | 2.3 | 9.8 | 124 | n/a n/a |
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| Highest daily rainfall (mm) | 192.3 | 355.6 | 283.0 | 156.7 | 184.3 | 138.8 | 75.9 | 62.2 | 16.8 | 21.0 | 29.7 | 85.2 | 355.6 | 109 | 1886 2012 |
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| Date | 25 Jan 1971 | 08 Feb 1963 | 16 Mar 1958 | 18 Apr 1937 | 28 May 1998 | 11 Jun 1992 | 18 Jul 1948 | 24 Aug 1933 | 11 Sep 1970 | 15 Oct 1975 | 10 Nov 1939 | 11 Dec 1995 | 08 Feb 1963 | ||||
| Mean number of days of rain | 2.6 | 3.6 | 3.2 | 1.6 | 3.4 | 3.7 | 2.4 | 1.5 | 0.5 | 0.3 | 0.3 | 0.6 | 23.7 | 109 | 1886 2012 |
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| Mean number of days of rain ≥ 1 mm | 1.8 | 2.3 | 2.0 | 1.0 | 2.2 | 2.4 | 1.5 | 0.9 | 0.2 | 0.2 | 0.2 | 0.3 | 15.0 | 109 | 1886 2012 |
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| Mean number of days of rain ≥ 10 mm | 0.7 | 1.0 | 0.8 | 0.4 | 1.0 | 0.9 | 0.4 | 0.1 | 0.0 | 0.0 | 0.1 | 0.1 | 5.5 | 109 | 1886 2012 |
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| Mean number of days of rain ≥ 25 mm | 0.2 | 0.5 | 0.4 | 0.2 | 0.4 | 0.4 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 2.3 | 109 | 1886 2012 |
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| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
| Other daily elements | |||||||||||||||||
| Mean daily wind run (km) | 0 | 1997 1999 |
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| Maximum wind gust speed (km/h) | 115 | 91 | 117 | 85 | 59 | 71 | 84 | 59 | 61 | 61 | 84 | 84 | 117 | 19 | 1976 2004 |
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| Mean daily sunshine (hours) | |
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| Mean daily solar exposure (MJ/m2) | 27.9 | 26.2 | 23.5 | 19.8 | 16.6 | 14.7 | 16.1 | 19.6 | 23.1 | 26.5 | 28.5 | 28.8 | 22.6 | 19 | 2007 2025 |
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| Mean number of clear days | 16.5 | 12.7 | 15.6 | 14.5 | 16.3 | 16.0 | 20.3 | 22.8 | 23.1 | 25.1 | 23.7 | 21.8 | 228.4 | 50 | 1957 2010 |
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| Mean number of cloudy days | 4.0 | 4.8 | 4.4 | 5.5 | 5.7 | 6.0 | 3.5 | 2.2 | 1.3 | 0.8 | 1.2 | 2.0 | 41.4 | 50 | 1957 2010 |
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| Mean daily evaporation (mm) | |
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| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
| 9 am conditions | |||||||||||||||||
| Mean 9am temperature (°C) | 30.7 | 30.5 | 29.8 | 27.4 | 22.9 | 19.3 | 18.2 | 20.1 | 23.0 | 26.0 | 28.4 | 30.0 | 25.5 | 110 | 1897 2010 |
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| Mean 9am wet-bulb temperature (°C) | 23.8 | 24.4 | 23.5 | 21.2 | 17.6 | 15.2 | 13.9 | 14.8 | 16.4 | 18.2 | 20.4 | 22.3 | 19.3 | 96 | 1897 2010 |
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| Mean 9am dew-point temperature (°C) | 19.5 | 21.9 | 20.2 | 18.0 | 13.7 | 12.5 | 10.1 | 10.2 | 10.8 | 12.2 | 14.3 | 17.2 | 15.0 | 36 | 1957 2010 |
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| Mean 9am relative humidity (%) | 55 | 62 | 58 | 58 | 59 | 64 | 62 | 55 | 48 | 45 | 45 | 50 | 55 | 55 | 1938 2010 |
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| Mean 9am cloud cover (oktas) | 2.3 | 2.7 | 2.4 | 2.3 | 2.4 | 2.4 | 1.8 | 1.2 | 0.8 | 0.8 | 1.0 | 1.3 | 1.8 | 110 | 1897 2010 |
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| Mean 9am wind speed (km/h) | 13.2 | 11.8 | 11.9 | 10.7 | 11.1 | 11.2 | 11.9 | 13.0 | 15.0 | 15.2 | 14.3 | 13.6 | 12.7 | 49 | 1957 2010 |
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| 9am wind speed vs direction plot |  |
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| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
| 3 pm conditions | |||||||||||||||||
| Mean 3pm temperature (°C) | 32.9 | 33.1 | 33.0 | 31.2 | 27.4 | 24.2 | 23.6 | 24.9 | 26.9 | 28.7 | 30.5 | 31.8 | 29.0 | 110 | 1897 2010 |
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| Mean 3pm wet-bulb temperature (°C) | 26.1 | 26.6 | 26.2 | 24.1 | 20.8 | 18.4 | 17.5 | 18.2 | 19.7 | 21.1 | 23.0 | 24.7 | 22.2 | 96 | 1897 2010 |
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| Mean 3pm dew-point temperature (°C) | 23.3 | 24.2 | 23.4 | 21.0 | 16.6 | 14.6 | 12.9 | 13.6 | 15.1 | 17.1 | 18.8 | 21.3 | 18.5 | 36 | 1957 2010 |
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| Mean 3pm relative humidity (%) | 59 | 61 | 58 | 56 | 54 | 55 | 53 | 51 | 51 | 51 | 53 | 56 | 55 | 54 | 1938 2010 |
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| Mean 3pm cloud cover (oktas) | 2.3 | 2.8 | 2.5 | 2.6 | 2.6 | 2.4 | 1.8 | 1.2 | 0.8 | 0.7 | 1.0 | 1.5 | 1.8 | 110 | 1897 2010 |
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| Mean 3pm wind speed (km/h) | 21.2 | 19.4 | 17.0 | 13.8 | 11.3 | 10.5 | 11.4 | 13.9 | 17.5 | 19.9 | 21.2 | 21.5 | 16.6 | 48 | 1957 2010 |
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| 3pm wind speed vs direction plot | |
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red = highest value
blue = lowest value
Product IDCJCM0039 Prepared at Thu 25 Sep 2025 00:59:08 AM AEST
Monthly statistics are only included if there are more than 10 years of data. The number of years (provided in the 2nd last column of the table) may differ between elements if the observing program at the site changed. More detailed data for individual sites can be obtained by contacting the Bureau.
Related Links
- This page URL: http://www.bom.gov.au/climate/averages/tables/cw_005016_All.shtml
- Summary statistics and locational map for this site:
http://www.bom.gov.au/climate/averages/tables/cw_005016.shtml - About climate averages: http://www.bom.gov.au/climate/cdo/about/about-stats.shtml
- Data file (csv): http://www.bom.gov.au/clim_data/cdio/tables/text/IDCJCM0039_005016.csv
- Climate averages home page URL: http://www.bom.gov.au/climate/data/index.shtml
- Bureau of Meteorology website: http://www.bom.gov.au
Related information
Maps
- Long term climatology maps for selected elements
- Rainfall maps and temperature maps based on recent observations
Recent observations for this site
Climate outlooks
- Monthly and seasonal climate outlooks
Additional climate information
Page created: Thu 25 Sep 2025 00:59:08 AM AEST