Evapotranspiration Calculations
Perth Airport - April 2026 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) |
|---|---|---|---|---|---|---|---|---|---|
| 28/03/2026 | 1.8 | 47.8 | 3.2 | 21.3 | 16.5 | 94 | 78 | 3.84 | 7.52 |
| 29/03/2026 | 3.5 | 5.0 | 1.2 | 25.4 | 17.2 | 96 | 56 | 3.78 | 16.18 |
| 30/03/2026 | 3.6 | 0.6 | 3.8 | 23.9 | 15.7 | 95 | 47 | 4.34 | 13.98 |
| 31/03/2026 | 3.9 | 1.4 | 5.0 | 24.3 | 16.1 | 89 | 39 | 4.59 | 12.59 |
| 01/04/2026 | 4.3 | 0.0 | 2.2 | 25.5 | 9.4 | 95 | 34 | 3.66 | 18.44 |
| 02/04/2026 | 6.6 | 0.0 | 4.8 | 29.6 | 13.9 | 82 | 28 | 6.40 | 19.36 |
| 03/04/2026 | 5.4 | 0.0 | 5.6 | 29.8 | 17.8 | 86 | 41 | 5.38 | 18.75 |
| Totals: | 29.1 | 54.8 | 25.8 |
