Evapotranspiration Calculations
Perth Airport - 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 | 11.4 | 0.0 | 10.0 | 39.7 | 14.8 | 74 | 5 | 5.08 | 31.29 |
| 02/12/2025 | 8.6 | 0.0 | 11.4 | 34.9 | 14.1 | 80 | 18 | 4.27 | 28.45 |
| 03/12/2025 | 7.6 | 0.0 | 7.4 | 28.7 | 16.2 | 84 | 36 | 6.27 | 31.39 |
| 04/12/2025 | 7.1 | 0.0 | 8.2 | 27.9 | 12.7 | 83 | 38 | 5.75 | 31.31 |
| 05/12/2025 | 7.0 | 0.0 | 8.8 | 26.1 | 14.3 | 70 | 36 | 6.43 | 27.80 |
| 06/12/2025 | 8.0 | 0.0 | 7.6 | 29.7 | 15.0 | 73 | 31 | 5.58 | 31.55 |
| 07/12/2025 | 7.4 | 0.0 | 7.6 | 29.4 | 12.7 | 90 | 30 | 4.78 | 31.64 |
| Totals: | 57.1 | 0.0 | 61.0 |
