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Climate statistics for Australian locations
Monthly climate statistics
All years of record
PORTLAND
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 | Site number: 090070 | Commenced: 1857 | Map | |
| Latitude: 38.35° S | Longitude: 141.59° E | Elevation: 55 m | Operational status: Open | |
| Statistics | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | Years | Plot | Map | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature | |||||||||||||||||
| Maximum temperature | |||||||||||||||||
| Mean maximum temperature (°C) | 21.8 | 21.9 | 20.7 | 18.4 | 16.1 | 14.1 | 13.6 | 14.4 | 15.8 | 17.3 | 18.8 | 20.5 | 17.8 | 80 | 1863 1956 |
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| Highest temperature (°C) | 42.8 | 40.6 | 40.9 | 33.9 | 27.8 | 20.8 | 21.1 | 24.4 | 28.3 | 36.0 | 38.9 | 41.7 | 42.8 | 72 | 1877 1957 |
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| Date | 02 Jan 1955 | 04 Feb 1898 | 13 Mar 1934 | 01 Apr 1954 | 05 May 1921 | 02 Jun 1915 | 11 Jul 1906 | 26 Aug 1878 | 21 Sep 1882 | 24 Oct 1914 | 18 Nov 1921 | 26 Dec 1941 | 02 Jan 1955 | ||||
| Lowest maximum temperature (°C) | |
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| Date | |||||||||||||||||
| Decile 1 maximum temperature (°C) | |
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| Decile 9 maximum temperature(°C) | |
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| Mean number of days ≥ 30 °C | |
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| Mean number of days ≥ 35 °C | |
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| Mean number of days ≥ 40 °C | |
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| Minimum temperature | |||||||||||||||||
| Mean minimum temperature (°C) | 12.7 | 13.1 | 12.0 | 10.3 | 8.7 | 7.5 | 6.5 | 6.9 | 7.8 | 8.9 | 10.3 | 11.6 | 9.7 | 80 | 1863 1956 |
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| Lowest temperature (°C) | 4.4 | 3.3 | 2.0 | 1.1 | -0.6 | -2.2 | -2.8 | -1.7 | -0.3 | 0.6 | 2.2 | 3.3 | -2.8 | 71 | 1877 1956 |
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| Date | 27 Jan 1934 | 03 Feb 1888 | 11 Mar 1913 | 05 Apr 1936 | 28 May 1898 | 29 Jun 1944 | 18 Jul 1890 | 07 Aug 1944 | 14 Sep 1914 | 01 Oct 1947 | 25 Nov 1877 | 31 Dec 1909 | 18 Jul 1890 | ||||
| Highest minimum temperature (°C) | |
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| Date | |||||||||||||||||
| Decile 1 minimum temperature (°C) | |
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| Decile 9 minimum temperature (°C) | |
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| Mean number of days ≤ 2 °C | |
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| Mean number of days ≤ 0 °C | |
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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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| Date | |||||||||||||||||
| 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) | 35.4 | 32.3 | 41.9 | 63.5 | 87.6 | 99.0 | 108.4 | 106.2 | 84.6 | 68.4 | 51.9 | 45.1 | 821.9 | 156 | 1857 2025 |
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| Highest rainfall (mm) | 145.0 | 135.5 | 340.8 | 174.3 | 212.4 | 211.2 | 236.2 | 236.0 | 171.6 | 165.5 | 136.9 | 145.2 | 1289.9 | 156 | 1857 2025 |
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| Date | 2011 | 1945 | 1946 | 1939 | 1923 | 1923 | 1947 | 2013 | 1912 | 1890 | 1968 | 1875 | 1946 | ||||
| Lowest rainfall (mm) | 0.0 | 0.0 | 1.5 | 0.0 | 15.6 | 20.8 | 23.6 | 8.6 | 31.6 | 4.9 | 7.5 | 1.1 | 486.6 | 156 | 1857 2025 |
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| Date | 2021 | 2021 | 1860 | 2020 | 1996 | 1967 | 1877 | 1901 | 1914 | 2015 | 1911 | 1915 | 1914 | ||||
| Decile 1 rainfall (mm) | 9.4 | 5.6 | 12.2 | 25.5 | 40.2 | 56.3 | 58.7 | 54.8 | 52.0 | 30.1 | 22.3 | 13.9 | 159 | n/a n/a |
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| Decile 5 (median) rainfall (mm) | 25.8 | 24.4 | 36.6 | 60.8 | 81.6 | 93.8 | 105.4 | 101.7 | 81.4 | 66.0 | 45.9 | 39.0 | 159 | n/a n/a |
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| Decile 9 rainfall (mm) | 69.1 | 67.4 | 79.4 | 107.4 | 140.9 | 153.0 | 167.2 | 163.6 | 123.8 | 111.2 | 92.0 | 83.6 | 159 | n/a n/a |
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| Highest daily rainfall (mm) | 62.0 | 78.7 | 104.1 | 68.1 | 50.3 | 45.2 | 42.4 | 50.8 | 49.6 | 57.7 | 75.0 | 55.6 | 104.1 | 139 | 1872 2025 |
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| Date | 06 Jan 1885 | 07 Feb 1957 | 16 Mar 1946 | 05 Apr 1939 | 17 May 1899 | 14 Jun 1891 | 06 Jul 1896 | 20 Aug 1951 | 23 Sep 1998 | 23 Oct 1949 | 29 Nov 1977 | 02 Dec 2024 | 16 Mar 1946 | ||||
| Mean number of days of rain | 8.4 | 7.7 | 11.1 | 14.3 | 18.2 | 19.4 | 20.9 | 21.0 | 18.2 | 15.7 | 12.5 | 11.0 | 178.4 | 139 | 1857 2025 |
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| Mean number of days of rain ≥ 1 mm | 4.6 | 4.2 | 6.1 | 8.6 | 11.4 | 12.6 | 13.7 | 14.1 | 11.7 | 9.9 | 7.5 | 6.2 | 110.6 | 139 | 1872 2025 |
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| Mean number of days of rain ≥ 10 mm | 0.7 | 0.7 | 1.0 | 1.6 | 2.2 | 2.6 | 2.8 | 2.8 | 2.0 | 1.5 | 1.2 | 1.1 | 20.2 | 139 | 1872 2025 |
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| Mean number of days of rain ≥ 25 mm | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.2 | 2.7 | 139 | 1872 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) | |
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| Maximum wind gust speed (km/h) | |
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| Date | |||||||||||||||||
| Mean daily sunshine (hours) | |
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| Mean daily solar exposure (MJ/m2) | 24.2 | 20.7 | 16.1 | 11.0 | 7.5 | 6.1 | 6.9 | 10.0 | 14.0 | 18.5 | 21.8 | 24.0 | 15.1 | 35 | 1990 2025 |
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| Mean number of clear days | |
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| Mean number of cloudy days | |
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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) | 17.5 | 17.4 | 16.2 | 13.9 | 11.7 | 9.8 | 9.2 | 10.2 | 12.0 | 13.6 | 15.0 | 16.6 | 13.6 | 42 | 1908 1956 |
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| Mean 9am wet-bulb temperature (°C) | 14.4 | 14.6 | 13.7 | 12.0 | 10.3 | 8.6 | 7.9 | 8.5 | 10.0 | 11.1 | 12.4 | 13.6 | 11.4 | 42 | 1908 1956 |
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| Mean 9am dew-point temperature (°C) | |
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| Mean 9am relative humidity (%) | 72 | 74 | 75 | 78 | 81 | 82 | 82 | 79 | 77 | 75 | 75 | 73 | 77 | 86 | 1858 1956 |
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| Mean 9am cloud cover (oktas) | 4.8 | 4.9 | 5.0 | 5.2 | 5.2 | 5.2 | 4.9 | 4.8 | 4.8 | 5.0 | 5.3 | 5.0 | 5.0 | 42 | 1908 1956 |
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| Mean 9am wind speed (km/h) | |
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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) | 19.7 | 20.0 | 19.0 | 16.7 | 14.9 | 12.8 | 12.6 | 13.3 | 14.5 | 15.5 | 16.8 | 18.5 | 16.2 | 35 | 1908 1956 |
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| Mean 3pm wet-bulb temperature (°C) | 15.6 | 16.0 | 15.1 | 13.7 | 12.1 | 10.7 | 10.1 | 10.3 | 11.3 | 12.2 | 13.2 | 14.4 | 12.9 | 35 | 1908 1956 |
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| Mean 3pm dew-point temperature (°C) | |
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| Mean 3pm relative humidity (%) | 61 | 64 | 64 | 68 | 70 | 74 | 71 | 67 | 65 | 65 | 65 | 62 | 66 | 35 | 1908 1956 |
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| Mean 3pm cloud cover (oktas) | 4.1 | 4.1 | 4.5 | 4.8 | 5.2 | 5.3 | 5.0 | 5.1 | 4.8 | 4.7 | 4.8 | 4.5 | 4.7 | 34 | 1909 1956 |
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| Mean 3pm wind speed (km/h) | |
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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 02 Oct 2025 01:08:16 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_090070_All.shtml
- Summary statistics and locational map for this site:
http://www.bom.gov.au/climate/averages/tables/cw_090070.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_090070.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 02 Oct 2025 01:08:16 AM AEST