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Portland Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
21.9 22.5 21.1 18.5 15.9 13.7 13.1 14.0 15.2 16.8 18.6 20.1 17.5
Mean Min (°C)
12.1 12.7 11.7 9.8 8.3 6.9 6.3 6.7 7.5 8.2 9.9 10.9 9.2
Mean Rain (mm)
36.9 26.9 46.5 57.6 78.7 109.9 110.9 109.9 86.6 62.4 53.3 51.0 833.6
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 8.8 13.5 17.8 21.0 23.0 24.1 23.7 20.8 18.9 14.8 13.3 208.3

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 32.4 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 1.2 0.0 -1.5 -2.3 -0.7 0.0 -0.9 1.5 0.9 -2.3
High Rain (mm)
72.0 45.4 77.2 50.0 59.4 38.8 36.8 61.0 37.0 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 18.2 22.3 22.5 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 13.8 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 84.8 175.2 114.4 197.0 202.4 219.0 255.0 134.4 123.4 113.4 125.0 1157.2
Low Rain (mm)
3.8 1.6 4.6 11.0 23.6 52.4 55.6 26.2 37.2 19.8 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°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
1.4 1.5 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.5 3.9
≥ 30°C
3.4 3.5 2.5 0.4 0.0 0.0 0.0 0.0 0.0 0.3 1.3 1.8 12.8
≤ 2°C
0.0 0.0 0.0 0.1 0.6 1.7 1.6 0.8 0.4 0.2 0.1 0.0 5.5
≤ 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
31 31 31 31 31 32 32 32 32 32 32 32 31.3
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013
Years of Maxima
31 31 31 31 31 32 32 32 32 32 32 32 31.4
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013
Years of Rainfall
31 31 31 31 31 32 32 32 32 32 32 32 31.5
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013 2013

Station Details

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

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Southwest WA heats up before a soaking

16:39 EST The mercury soared in the nation's southwest today with Perth recording its hottest September day on record, however heavy rain and cooler temperatures will arrive on Sunday.

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