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Home › Climate › Portland Climate

Portland Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
 21.8 22.4 21.0 18.5 15.8 13.7 13.1 14.0 15.1 16.8 18.6 20.1 17.5
Mean Min (°C)
 12.2 12.7 11.6 9.8 8.3 6.9 6.2 6.7 7.5 8.2 9.8 10.9 9.2
Mean Rain (mm)
 37.6 27.0 46.3 58.0 76.8 107.7 107.4 105.2 87.3 61.2 53.2 51.1 818.5
Median Rain (mm)
 27.0 17.4 35.4 56.2 64.8 104.8 106.9 98.1 82.6 54.6 42.4 41.8 800.0
Mean Rain Days
 11.0 8.8 13.3 17.7 20.9 23.0 24.0 23.4 20.8 18.9 14.7 13.3 202.4

Portland Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
 41.6 43.1 40.5 34.2 26.8 20.6 18.7 24.4 31.0 32.4 35.5 40.9 43.1
Low Max (°C)
 13.9 14.5 13.9 10.9 9.6 9.3 8.5 9.1 9.4 10.3 11.3 12.4 8.5
High Min (°C)
 25.5 25.2 22.5 21.1 15.3 14.0 12.8 13.8 16.6 17.5 18.7 20.7 25.5
Low Min (°C)
 1.6 4.1 2.5 1.5 0.0 -1.5 -2.3 -0.7 0.0 -0.9 1.8 0.9 -2.3
High Rain (mm)
 72.0 45.4 77.2 50.0 59.4 34.6 36.8 39.0 37.0 43.0 68.6 61.0 77.2

Portland Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
 24.2 26.3 23.5 21.2 17.2 14.9 14.1 15.7 17.1 18.2 22.3 22.5 18.3
Low Mn. Max (°C)
 19.1 20.1 19.3 16.2 14.5 12.3 11.9 12.4 12.8 14.7 16.3 17.1 16.7
High Mn. Min (°C)
 13.9 14.8 13.8 11.5 10.6 8.7 7.7 7.9 8.4 9.8 12.3 13.0 9.9
Low Mn. Min (°C)
 10.2 10.5 10.4 8.5 6.9 4.5 4.6 5.7 6.4 6.2 8.6 8.5 8.3
High Rain (mm)
 149.6 84.8 175.2 114.4 197.0 202.4 163.8 183.8 134.4 106.6 113.4 125.0 1040.8
Low Rain (mm)
 3.8 1.6 4.6 11.0 23.6 52.4 55.6 26.2 37.2 19.8 16.2 13.8 583.6

Portland Annual Temperatures & Rainfall

Portland annual climate

Portland Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 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 0.3
≥ 35°C
 1.3 1.4 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 3.7
≥ 30°C
 3.3 3.3 2.3 0.4 0.0 0.0 0.0 0.0 0.0 0.3 1.2 1.8 12.3
≤ 2°C
 0.0 0.0 0.0 0.1 0.6 1.7 1.5 0.9 0.4 0.2 0.1 0.0 5.4
≤ 0°C
 0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.1 0.0 0.1 0.0 0.0 0.7

Portland 'per Week' Values (14th/86th Percentiles)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
 27.8 29.4 27.2 22.8 18.2 15.3 14.8 16.4 18.1 21.4 23.8 25.0 22.0
Low Max
 17.5 17.9 16.8 14.9 13.6 11.9 11.3 11.7 12.4 13.3 14.6 16.1 12.9
High Min
 15.0 15.4 14.5 12.6 11.1 9.6 8.9 9.1 10.0 11.0 12.6 13.8 13.0
Low Min
 9.0 9.3 8.5 6.6 5.2 3.9 3.6 4.2 4.7 5.3 7.0 7.6 5.5

Portland Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
 30 30 30 30 29 30 30 30 30 30 30 30 29.6
Earliest Entry
 1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012
Years of Maxima
 30 30 30 30 29 30 30 30 30 30 30 30 29.7
Earliest Entry
 1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012
Years of Rainfall
 30 30 30 30 29 30 30 30 30 30 30 30 29.9
Earliest Entry
 1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
 2012 2012 2012 2012 2011 2011 2011 2011 2011 2011 2011 2011 2012

Station Details

PORTLAND (CASHMORE AIRPORT)
South West, Victoria
38.3148°S 141.4705°E 81m AMSL
Commenced 1982

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