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Portland Climate

Portland Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
22.0 22.5 21.1 18.5 15.9 13.7 13.1 14.0 15.2 16.9 18.7 20.3 17.6
Mean Min (°C)
12.3 12.8 11.8 9.9 8.4 7.0 6.3 6.7 7.5 8.3 9.9 10.9 9.3
Mean Rain (mm)
37.2 27.9 47.4 59.6 82.2 111.6 111.9 106.9 86.7 61.6 52.3 50.1 835.3
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
10.9 8.9 13.7 18.1 21.4 23.0 24.4 23.6 20.7 18.6 14.7 13.3 205.4

Portland Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
42.1 43.1 40.5 34.2 26.8 20.6 18.7 24.4 31.0 32.8 35.5 40.9 43.1
Low Max (°C)
13.9 14.5 13.6 10.9 9.6 9.2 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 1.2 0.0 -1.5 -2.3 -0.7 0.0 -0.9 1.5 0.9 -2.3
High Rain (mm)
72.0 50.0 77.2 50.0 59.4 71.2 36.8 61.0 46.0 55.0 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 24.7 21.2 17.2 14.9 14.1 15.7 17.3 20.6 22.3 24.1 18.6
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 15.1 14.2 11.5 10.6 8.7 7.7 8.2 9.5 9.8 12.3 13.0 10.0
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 84.8 175.2 114.4 197.0 202.4 219.0 255.0 161.2 123.4 113.4 125.0 1157.2
Low Rain (mm)
3.8 1.6 4.6 11.0 23.6 52.4 55.6 26.2 37.2 7.0 16.2 13.8 583.6

Portland Annual Temperatures & Rainfall

PORTLAND (CASHMORE AIRPORT)

Mean daily minimum temp
Mean daily maximum temp
Highest/lowest on record
Highest/lowest on record
Mean monthly rainfall

Portland Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40.0°C
0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4
≥ 35.0°C
1.4 1.4 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.6 3.9
≥ 30.0°C
3.4 3.5 2.5 0.3 0.0 0.0 0.0 0.0 0.0 0.4 1.3 1.8 12.9
≤ 2.0°C
0.0 0.0 0.0 0.1 0.6 1.6 1.5 0.9 0.5 0.1 0.1 0.0 5.3
≤ 0.0°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 0.6

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
35 35 35 35 35 35 35 35 35 35 35 35 34.7
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Maxima
35 35 35 35 35 35 35 35 35 35 35 35 34.8
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Rainfall
35 35 35 35 35 35 35 35 35 35 35 35 34.9
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017

Station Details

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

Weather News

WA weather: 'Winter' storm in summer brings rain, strong winds but no major damage

11:28 EDT

A typical "winter" storm that blew through Western Australia's South West at the start of summer has brought with it two months worth of rain and wind gusts of more than 100 kilometres an hour.

Severe and 'unusual' summer weather forces cancellation of music and Christmas events

22:38 EDT

Major Perth events, including Carols by Candlelight and A Day on the Green, have been cancelled as a severe and unseasonable storm approaches the city.

A week of two halves for Tasmania

16:29 EDT

It will be one of those weeks where Tasmanians will need sunnies and a hat, followed by a jumper and umbrella.