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Climate statistics for Australian locations
Monthly climate statistics
All years of record
PORTLAND AIRPORT
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: PORTLAND AIRPORT | Site number: 090171 | Commenced: 1982 | Map | |
| Latitude: 38.31° S | Longitude: 141.47° E | Elevation: 81 m | Operational status: Open | |
| 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) | 22.3 | 22.5 | 21.2 | 18.6 | 15.9 | 13.8 | 13.2 | 14.1 | 15.3 | 17.0 | 18.8 | 20.4 | 17.8 | 43 | 1982 2025 |
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| Highest temperature (°C) | 42.5 | 43.1 | 40.5 | 34.2 | 26.8 | 20.6 | 18.7 | 24.4 | 31.0 | 32.8 | 35.5 | 43.6 | 43.6 | 43 | 1982 2025 |
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| Date | 24 Jan 2019 | 16 Feb 1983 | 17 Mar 2008 | 09 Apr 2005 | 09 May 2013 | 10 Jun 1987 | 27 Jul 2018 | 20 Aug 1995 | 26 Sep 1987 | 24 Oct 2019 | 29 Nov 2012 | 20 Dec 2019 | 20 Dec 2019 | ||||
| Lowest maximum temperature (°C) | 13.9 | 14.5 | 13.6 | 10.9 | 9.6 | 9.2 | 8.5 | 9.0 | 9.4 | 10.3 | 11.3 | 12.4 | 8.5 | 43 | 1982 2025 |
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| Date | 01 Jan 1996 | 02 Feb 1990 | 26 Mar 2015 | 27 Apr 2009 | 27 May 2000 | 21 Jun 2023 | 29 Jul 2008 | 03 Aug 2017 | 05 Sep 1995 | 28 Oct 2003 | 16 Nov 1983 | 13 Dec 2008 | 29 Jul 2008 | ||||
| Decile 1 maximum temperature (°C) | 17.4 | 17.7 | 16.6 | 14.7 | 13.2 | 11.6 | 11.1 | 11.5 | 12.2 | 13.2 | 14.3 | 16.0 | 42 | 1982 2025 |
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| Decile 9 maximum temperature(°C) | 30.8 | 31.3 | 29.0 | 24.2 | 18.9 | 15.9 | 15.2 | 17.2 | 19.9 | 23.5 | 26.7 | 27.8 | 42 | 1982 2025 |
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| Mean number of days ≥ 30 °C | 3.5 | 3.3 | 2.5 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 1.3 | 2.0 | 13.4 | 43 | 1982 2025 |
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| Mean number of days ≥ 35 °C | 1.4 | 1.3 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 3.8 | 43 | 1982 2025 |
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| Mean number of days ≥ 40 °C | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 43 | 1982 2025 |
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| Minimum temperature | |||||||||||||||||
| Mean minimum temperature (°C) | 12.5 | 12.8 | 11.8 | 9.9 | 8.4 | 6.9 | 6.3 | 6.8 | 7.6 | 8.4 | 10.0 | 11.0 | 9.4 | 43 | 1982 2025 |
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| Lowest temperature (°C) | 1.6 | 4.1 | 2.5 | 1.2 | 0.0 | -1.5 | -2.3 | -1.1 | -0.6 | -0.9 | 1.5 | 0.9 | -2.3 | 43 | 1982 2025 |
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| Date | 03 Jan 2009 | 16 Feb 1985 | 01 Mar 2001 | 20 Apr 2013 | 29 May 1990 | 13 Jun 1996 | 21 Jul 2005 | 01 Aug 2024 | 17 Sep 2019 | 10 Oct 2006 | 14 Nov 2012 | 07 Dec 2006 | 21 Jul 2005 | ||||
| Highest minimum temperature (°C) | 25.5 | 25.2 | 22.5 | 21.1 | 15.3 | 14.1 | 12.8 | 13.8 | 16.6 | 17.5 | 20.6 | 20.7 | 25.5 | 43 | 1982 2025 |
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| Date | 05 Jan 2007 | 18 Feb 2007 | 27 Mar 1990 | 01 Apr 2005 | 04 May 2005 | 29 Jun 2019 | 07 Jul 1988 | 29 Aug 2005 | 24 Sep 2001 | 15 Oct 1991 | 23 Nov 2024 | 12 Dec 1998 | 05 Jan 2007 | ||||
| Decile 1 minimum temperature (°C) | 8.5 | 8.9 | 7.9 | 6.2 | 4.7 | 2.8 | 2.8 | 3.8 | 4.3 | 4.8 | 6.3 | 7.2 | 42 | 1982 2025 |
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| Decile 9 minimum temperature (°C) | 15.8 | 16.1 | 15.3 | 13.3 | 11.8 | 10.0 | 9.5 | 9.6 | 10.5 | 11.7 | 13.4 | 14.4 | 42 | 1982 2025 |
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| Mean number of days ≤ 2 °C | 0.0 | 0.0 | 0.0 | 0.1 | 0.5 | 1.6 | 1.8 | 0.8 | 0.5 | 0.2 | 0.0 | 0.0 | 5.5 | 43 | 1982 2025 |
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| Mean number of days ≤ 0 °C | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 43 | 1982 2025 |
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| Ground surface temperature | |||||||||||||||||
| Mean daily ground minimum temperature (°C) | |
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| Lowest ground temperature (°C) | |
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| Mean number of days ground min. temp. ≤ -1 °C | |
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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) | 35.2 | 28.0 | 45.2 | 59.0 | 82.2 | 108.6 | 115.1 | 105.1 | 86.5 | 63.5 | 54.1 | 50.7 | 835.8 | 43 | 1982 2025 |
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| Highest rainfall (mm) | 149.6 | 84.8 | 175.2 | 114.4 | 197.0 | 202.4 | 225.4 | 255.0 | 161.2 | 131.6 | 113.4 | 125.0 | 1157.2 | 43 | 1982 2025 |
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| Date | 2011 | 2005 | 1983 | 1995 | 2007 | 2004 | 2021 | 2013 | 2016 | 2021 | 1992 | 2010 | 2013 | ||||
| Lowest rainfall (mm) | 1.4 | 1.6 | 4.6 | 11.0 | 16.6 | 49.6 | 55.6 | 26.2 | 37.2 | 7.0 | 16.2 | 12.8 | 583.6 | 43 | 1982 2025 |
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| Date | 2019 | 2024 | 1994 | 1993 | 2024 | 2017 | 2001 | 1982 | 2014 | 2015 | 1993 | 2021 | 2006 | ||||
| Decile 1 rainfall (mm) | 10.5 | 5.0 | 20.6 | 26.8 | 34.0 | 64.2 | 72.7 | 56.3 | 58.4 | 30.0 | 25.9 | 20.7 | 44 | n/a n/a |
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| Decile 5 (median) rainfall (mm) | 32.2 | 22.2 | 41.2 | 56.2 | 74.6 | 107.0 | 107.4 | 102.2 | 80.0 | 54.6 | 48.4 | 45.2 | 44 | n/a n/a |
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| Decile 9 rainfall (mm) | 59.2 | 55.8 | 65.6 | 95.2 | 130.6 | 151.9 | 163.3 | 159.6 | 125.4 | 106.0 | 93.2 | 98.5 | 44 | n/a n/a |
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| Highest daily rainfall (mm) | 72.0 | 50.0 | 77.2 | 50.0 | 59.4 | 71.2 | 38.6 | 61.0 | 46.0 | 55.0 | 68.6 | 61.0 | 77.2 | 43 | 1982 2025 |
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| Date | 14 Jan 2011 | 25 Feb 2016 | 22 Mar 1983 | 06 Apr 1992 | 27 May 2000 | 14 Jun 2014 | 03 Jul 2021 | 14 Aug 2013 | 09 Sep 2016 | 23 Oct 2013 | 26 Nov 2002 | 13 Dec 2008 | 22 Mar 1983 | ||||
| Mean number of days of rain | 10.4 | 8.9 | 13.7 | 17.5 | 20.6 | 22.0 | 23.8 | 23.4 | 20.2 | 18.0 | 14.6 | 13.5 | 206.6 | 43 | 1982 2025 |
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| Mean number of days of rain ≥ 1 mm | 5.3 | 4.5 | 7.6 | 9.9 | 13.8 | 16.1 | 17.6 | 17.2 | 14.5 | 11.0 | 8.7 | 7.8 | 134.0 | 43 | 1982 2025 |
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| Mean number of days of rain ≥ 10 mm | 0.9 | 0.7 | 1.2 | 1.3 | 2.3 | 3.4 | 3.8 | 3.0 | 2.6 | 1.5 | 1.3 | 1.5 | 23.5 | 43 | 1982 2025 |
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| Mean number of days of rain ≥ 25 mm | 0.2 | 0.2 | 0.1 | 0.2 | 0.2 | 0.4 | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 2.7 | 43 | 1982 2025 |
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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) | 379 | 367 | 352 | 333 | 367 | 358 | 413 | 441 | 448 | 417 | 378 | 406 | 388 | 19 | 2003 2025 |
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| Maximum wind gust speed (km/h) | 83 | 85 | 93 | 104 | 91 | 106 | 102 | 106 | 120 | 106 | 94 | 91 | 120 | 22 | 2003 2025 |
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| Date | 22 Jan 2009 | 14 Feb 2018 | 18 Mar 2018 | 15 Apr 2009 | 26 May 2021 | 24 Jun 2014 | 07 Jul 2018 | 28 Aug 2024 | 02 Sep 2024 | 02 Oct 2013 | 12 Nov 2016 | 12 Dec 2005 | 02 Sep 2024 | ||||
| Mean daily sunshine (hours) | |
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| Mean daily solar exposure (MJ/m2) | 24.0 | 20.5 | 15.8 | 10.8 | 7.5 | 6.2 | 6.9 | 9.9 | 13.7 | 18.2 | 21.5 | 23.9 | 14.9 | 35 | 1990 2025 |
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| Mean number of clear days | 4.5 | 4.4 | 4.4 | 3.6 | 2.8 | 1.9 | 2.2 | 2.9 | 2.8 | 3.3 | 3.4 | 3.9 | 40.1 | 28 | 1982 2010 |
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| Mean number of cloudy days | 11.6 | 9.7 | 13.0 | 13.7 | 16.1 | 15.3 | 14.6 | 13.1 | 13.8 | 11.9 | 13.0 | 13.5 | 159.3 | 28 | 1982 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) | 16.5 | 16.6 | 15.4 | 13.8 | 11.5 | 9.4 | 8.7 | 9.7 | 11.2 | 12.9 | 14.0 | 15.2 | 12.9 | 28 | 1982 2010 |
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| Mean 9am wet-bulb temperature (°C) | 13.8 | 14.3 | 13.3 | 11.9 | 10.2 | 8.3 | 7.6 | 8.4 | 9.4 | 10.6 | 11.6 | 12.7 | 11.0 | 26 | 1982 2010 |
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| Mean 9am dew-point temperature (°C) | 11.6 | 12.2 | 11.6 | 10.1 | 9.1 | 7.2 | 6.3 | 6.7 | 7.4 | 8.2 | 9.6 | 10.4 | 9.2 | 27 | 1982 2010 |
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| Mean 9am relative humidity (%) | 75 | 77 | 79 | 80 | 86 | 87 | 86 | 82 | 79 | 75 | 76 | 75 | 80 | 27 | 1982 2010 |
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| Mean 9am cloud cover (oktas) | 5.4 | 5.3 | 5.3 | 5.5 | 5.6 | 5.6 | 5.4 | 5.1 | 5.5 | 5.3 | 5.6 | 5.6 | 5.4 | 28 | 1982 2010 |
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| Mean 9am wind speed (km/h) | 18.8 | 17.8 | 16.2 | 16.0 | 14.8 | 16.4 | 17.5 | 19.9 | 21.2 | 21.8 | 19.7 | 20.1 | 18.3 | 28 | 1982 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) | 19.8 | 20.5 | 19.2 | 16.9 | 14.6 | 12.5 | 11.9 | 12.6 | 13.7 | 15.0 | 16.8 | 18.2 | 16.0 | 28 | 1982 2010 |
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| Mean 3pm wet-bulb temperature (°C) | 15.2 | 16.1 | 14.7 | 13.1 | 12.1 | 10.4 | 9.6 | 10.2 | 10.8 | 11.8 | 13.3 | 14.3 | 12.6 | 26 | 1982 2010 |
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| Mean 3pm dew-point temperature (°C) | 11.7 | 12.5 | 11.5 | 10.2 | 9.7 | 8.1 | 7.2 | 7.4 | 8.0 | 9.0 | 10.4 | 11.1 | 9.7 | 27 | 1982 2010 |
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| Mean 3pm relative humidity (%) | 62 | 63 | 64 | 67 | 74 | 76 | 74 | 72 | 70 | 69 | 68 | 66 | 69 | 27 | 1982 2010 |
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| Mean 3pm cloud cover (oktas) | 4.3 | 4.3 | 4.7 | 5.0 | 5.5 | 5.6 | 5.4 | 5.3 | 5.2 | 4.8 | 4.8 | 4.9 | 5.0 | 28 | 1982 2010 |
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| Mean 3pm wind speed (km/h) | 24.8 | 24.0 | 22.6 | 20.5 | 19.3 | 20.5 | 21.8 | 25.3 | 25.3 | 25.5 | 24.7 | 25.3 | 23.3 | 28 | 1982 2010 |
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| 3pm wind speed vs direction plot | |
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red = highest value
blue = lowest value
Product IDCJCM0035 Prepared at Thu 25 Sep 2025 01:05:49 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_090171_All.shtml
- Summary statistics and locational map for this site:
http://www.bom.gov.au/climate/averages/tables/cw_090171.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/IDCJCM0035_090171.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
- Daily Weather Observations from this site are included in the Daily Weather Observations Portland
Climate outlooks
- Monthly and seasonal climate outlooks
Additional climate information
Page created: Thu 25 Sep 2025 01:05:49 AM AEST