Evapotranspiration Calculations
Perth Airport - April 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/04/2025 | 7.2 | 0.0 | 6.8 | 33.9 | 19.0 | 62 | 25 | 4.97 | 19.57 |
| 02/04/2025 | 7.2 | 0.0 | 8.0 | 30.3 | 19.2 | 66 | 35 | 7.94 | 16.95 |
| 03/04/2025 | 7.4 | 0.0 | 10.0 | 29.7 | 17.2 | 55 | 35 | 8.79 | 13.36 |
| 04/04/2025 | 5.8 | 0.0 | 7.4 | 22.6 | 19.3 | 70 | 38 | 11.54 | 6.45 |
| 05/04/2025 | 7.0 | 1.0 | 4.8 | 27.6 | 17.9 | 60 | 32 | 8.41 | 15.65 |
| 06/04/2025 | 5.6 | 0.0 | 4.8 | 30.4 | 18.3 | 78 | 37 | 4.91 | 18.59 |
| 07/04/2025 | 4.0 | 0.0 | 6.0 | 29.3 | 13.9 | 91 | 44 | 2.77 | 17.79 |
| 08/04/2025 | 4.0 | 0.0 | 4.8 | 28.6 | 15.8 | 96 | 49 | 3.64 | 16.72 |
| 09/04/2025 | 4.6 | 0.0 | 4.6 | 27.5 | 17.4 | 85 | 41 | 4.72 | 16.66 |
| 10/04/2025 | 5.2 | 0.0 | 4.6 | 30.6 | 13.0 | 84 | 31 | 4.02 | 18.08 |
| 11/04/2025 | 8.0 | 0.0 | 6.0 | 35.3 | 16.0 | 81 | 18 | 6.08 | 17.83 |
| 12/04/2025 | 4.1 | 1.6 | 7.0 | 28.4 | 17.9 | 90 | 49 | 3.62 | 17.51 |
| 13/04/2025 | 4.0 | 0.0 | 4.6 | 29.4 | 18.0 | 93 | 42 | 3.63 | 14.14 |
| 14/04/2025 | 3.5 | 2.6 | 3.4 | 26.0 | 15.1 | 96 | 49 | 3.67 | 15.89 |
| 15/04/2025 | 4.2 | 0.0 | 5.2 | 26.9 | 10.9 | 96 | 32 | 3.65 | 17.14 |
| 16/04/2025 | 4.9 | 0.0 | 4.0 | 29.2 | 11.1 | 83 | 31 | 4.19 | 16.12 |
| 17/04/2025 | 5.9 | 0.0 | 4.8 | 28.2 | 16.5 | 76 | 30 | 6.29 | 16.88 |
| 18/04/2025 | 3.9 | 0.0 | 5.8 | 23.5 | 9.3 | 89 | 33 | 4.45 | 13.10 |
| 19/04/2025 | 4.4 | 0.0 | 4.2 | 22.7 | 11.1 | 69 | 30 | 4.76 | 15.64 |
| Totals: | 100.9 | 5.2 | 106.8 |
