Evapotranspiration Calculations
Perth Metro - December 2025 daily calculations
| Date |
Evapotrans- piration (mm) 0000- 2400 |
Rain (mm) 0900- 0900 |
Pan Evaporation (mm) 0900- 0900 |
Max Temp |
Min Temp |
Max Rel Hum (%) |
Min Rel Hum (%) |
Average 10m Wind Speed (m/sec) |
Solar Radiation (MJ/sq m) |
| 01/12/2025 | 8.5 | 0.0 | | 39.0 | 16.4 | 78 | 8 | 2.62 | 31.41 |
| 02/12/2025 | 6.7 | 0.0 | | 33.2 | 16.8 | 84 | 25 | 2.29 | 28.26 |
| 03/12/2025 | 6.1 | 0.0 | | 25.6 | 16.7 | 85 | 47 | 3.87 | 31.43 |
| 04/12/2025 | 6.2 | 0.0 | | 25.6 | 14.6 | 73 | 45 | 3.78 | 31.44 |
| 05/12/2025 | 5.9 | 0.0 | | 24.1 | 15.5 | 70 | 44 | 4.03 | 28.09 |
| 06/12/2025 | 6.7 | 0.0 | | 28.0 | 14.9 | 73 | 38 | 3.43 | 31.69 |
| 07/12/2025 | 6.5 | 0.0 | | 27.7 | 15.0 | 85 | 37 | 3.12 | 31.74 |
| 08/12/2025 | 6.5 | 0.0 | | 28.3 | 16.7 | 87 | 47 | 3.67 | 31.78 |
| 09/12/2025 | | 0.0 | | | 16.7 | 79 | 51 | 2.97 | 31.83 |
| 10/12/2025 | 8.1 | | | 34.5 | 16.8 | 66 | 27 | 3.23 | 31.84 |
| 11/12/2025 | 7.6 | 0.0 | | 32.4 | 18.2 | 79 | 33 | 3.41 | 31.83 |
| 12/12/2025 | 8.9 | 0.0 | | 35.7 | 19.4 | 63 | 21 | 3.69 | 31.87 |
| 13/12/2025 | 9.0 | 0.0 | | 36.9 | 18.2 | 63 | 18 | 3.52 | 31.93 |
| 14/12/2025 | 7.9 | 0.0 | | 40.1 | 22.3 | 83 | 19 | 3.64 | 19.83 |
| 15/12/2025 | 7.4 | 15.2 | | 33.9 | 22.3 | 83 | 36 | 2.52 | 31.96 |
| 16/12/2025 | 6.4 | 0.0 | | 30.7 | 21.3 | 98 | 50 | 2.44 | 30.93 |
| 17/12/2025 | 6.1 | 0.0 | | 24.6 | 20.2 | 79 | 47 | 4.35 | 28.92 |
| 18/12/2025 | 7.5 | 0.0 | | 31.1 | 16.1 | 74 | 29 | 3.39 | 31.93 |
| Totals: | 122.0 | 15.2 | | | | | | | |
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