Portland Airport Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
22.2 22.5 21.1 18.5 15.9 13.8 13.2 14.0 15.3 17.0 18.7 20.3 17.7
Mean Min (°C)
12.4 12.8 11.8 9.9 8.4 6.9 6.3 6.7 7.5 8.4 10.0 11.0 9.3
Mean Rain (mm)
35.9 28.4 45.8 59.2 83.0 109.5 114.0 106.0 85.8 63.8 54.5 49.4 843.2
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
10.7 9.1 14.0 18.2 21.6 23.0 24.5 23.8 20.5 18.3 14.9 13.6 213.0

Portland Airport Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°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
Low Max (°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
High Min (°C)
25.5 25.2 22.5 21.1 15.3 14.1 12.8 13.8 16.6 17.5 20.3 20.7 25.5
Low Min (°C)
1.6 4.1 2.5 1.2 0.0 -1.5 -2.3 -0.7 -0.6 -0.9 1.5 0.9 -2.3
High Rain (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

Portland Airport Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
25.0 26.3 24.7 21.2 17.2 14.9 14.1 15.7 17.4 20.6 22.3 24.1 18.6
Low Mn. Max (°C)
19.1 20.1 19.0 16.2 14.5 12.3 11.9 12.4 12.8 14.7 16.3 17.1 16.7
High Mn. Min (°C)
14.9 15.1 14.2 11.5 10.6 8.7 8.1 8.2 9.5 9.8 12.7 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 84.8 175.2 114.4 197.0 202.4 225.4 255.0 161.2 131.6 113.4 125.0 1157.2
Low Rain (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

Portland Airport Annual Temperatures & Rainfall

Portland Airport annual climate

Portland Airport 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 0.4
≥ 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 3.9
≥ 30°C
3.5 3.3 2.4 0.4 0.0 0.0 0.0 0.0 0.0 0.4 1.3 1.9 13.2
≤ 2°C
0.0 0.0 0.0 0.1 0.6 1.6 1.7 0.9 0.5 0.2 0.1 0.0 5.6
≤ 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 0.7

Portland Airport '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 Airport Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
42 42 42 42 42 42 42 42 42 42 42 42 41.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2024 2024 2024 2024 2024 2024 2023 2023 2023 2023 2023 2023 2024
Years of Maxima
42 42 42 42 42 42 42 42 42 42 42 42 41.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2024 2024 2024 2024 2024 2024 2023 2023 2023 2023 2023 2023 2024
Years of Rainfall
42 42 42 42 42 42 42 42 42 42 42 42 41.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2024 2024 2024 2024 2024 2024 2023 2023 2023 2023 2023 2023 2024

Station Details

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

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