Portland Airport Climate

Portland Airport Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
22.1 22.5 21.1 18.5 15.9 13.8 13.1 14.0 15.3 17.0 18.8 20.3 17.7
Mean Min (°C)
12.3 12.8 11.8 9.9 8.4 6.8 6.3 6.7 7.5 8.4 9.9 11.0 9.3
Mean Rain (mm)
36.1 29.0 46.6 58.9 83.7 107.7 115.2 106.9 88.0 61.6 53.9 50.5 841.0
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 13.9 18.1 21.5 23.0 24.5 23.7 20.6 18.2 14.7 13.3 211.7

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)
24.3 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 12.7 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 84.8 175.2 114.4 197.0 202.4 225.4 255.0 161.2 126.4 113.4 125.0 1157.2
Low Rain (mm)
1.4 1.6 4.6 11.0 23.6 49.6 55.6 26.2 37.2 7.0 16.2 13.8 583.6

Portland Airport Annual Temperatures & Rainfall

CASHMORE AIRPORT

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

Portland Airport 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 0.1 0.4
≥ 35.0°C
1.5 1.3 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.6 4.0
≥ 30.0°C
3.4 3.4 2.5 0.4 0.0 0.0 0.0 0.0 0.0 0.4 1.4 2.0 13.5
≤ 2.0°C
0.0 0.0 0.0 0.1 0.6 1.7 1.6 0.9 0.5 0.1 0.1 0.0 5.6
≤ 0.0°C
0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.1 0.1 0.1 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
39 39 39 39 39 40 40 39 39 39 39 39 38.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2020 2021
Years of Maxima
39 39 39 39 39 40 40 39 39 39 39 39 38.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2020 2021
Years of Rainfall
39 39 39 39 39 40 40 39 39 39 39 39 38.0
Earliest Entry
1983 1983 1983 1983 1983 1982 1982 1982 1982 1982 1982 1982 1982
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2020 2021

Station Details

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