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Portland Airport Long-term Averages
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Ann | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Max (°C) |
22.3 | 22.5 | 21.1 | 18.5 | 15.9 | 13.8 | 13.2 | 14.1 | 15.3 | 17.0 | 18.8 | 20.4 | 17.7 |
| Mean Min (°C) |
12.5 | 12.8 | 11.8 | 9.9 | 8.4 | 6.8 | 6.3 | 6.8 | 7.5 | 8.4 | 10.0 | 11.0 | 9.3 |
| Mean Rain (mm) |
35.2 | 28.4 | 45.8 | 59.2 | 83.0 | 108.1 | 113.5 | 105.5 | 86.5 | 63.5 | 54.1 | 50.7 | 839.2 |
| 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 |
10.5 | 9.1 | 14.0 | 18.2 | 21.6 | 22.9 | 24.5 | 23.8 | 20.6 | 18.3 | 14.9 | 13.6 | 212.8 |
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 | 20.6 | 20.7 | 25.5 |
| Low Min (°C) |
1.6 | 4.1 | 2.5 | 1.2 | 0.0 | -1.5 | -2.3 | -1.1 | -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 | 16.6 | 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 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 | 2.0 | 13.2 |
| ≤ 2°C |
0.0 | 0.0 | 0.0 | 0.1 | 0.6 | 1.6 | 1.8 | 0.9 | 0.5 | 0.2 | 0.1 | 0.0 | 5.7 |
| ≤ 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 |
43 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 42.0 |
| Earliest Entry |
1983 | 1983 | 1983 | 1983 | 1983 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 |
| Latest Entry |
2025 | 2025 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2025 |
| Years of Maxima |
43 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 42.0 |
| Earliest Entry |
1983 | 1983 | 1983 | 1983 | 1983 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 |
| Latest Entry |
2025 | 2025 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2025 |
| Years of Rainfall |
43 | 42 | 42 | 42 | 42 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 42.0 |
| Earliest Entry |
1983 | 1983 | 1983 | 1983 | 1983 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 | 1982 |
| Latest Entry |
2025 | 2025 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2024 | 2025 |
Station Details
CASHMORE AIRPORT
South West, Victoria
South West, Victoria
38.3148°S 141.4705°E
81m AMSL
Commenced 1982
Commenced 1982
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