Evapotranspiration Calculations
Perth Metro - October 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/10/2025 | 3.7 | 0.0 | 21.9 | 10.8 | 98 | 42 | 1.87 | 22.66 | |
| 02/10/2025 | 4.3 | 0.0 | 27.4 | 7.8 | 98 | 28 | 1.61 | 23.60 | |
| 03/10/2025 | 3.4 | 0.0 | 22.8 | 9.0 | 96 | 54 | 1.98 | 19.98 | |
| 04/10/2025 | 3.1 | 4.4 | 23.3 | 14.7 | 99 | 64 | 2.74 | 16.41 | |
| 05/10/2025 | 2.3 | 15.4 | 17.2 | 12.4 | 99 | 54 | 2.70 | 11.29 | |
| 06/10/2025 | 3.9 | 0.0 | 19.7 | 7.7 | 94 | 38 | 2.61 | 24.25 | |
| 07/10/2025 | 2.8 | 0.0 | 18.9 | 9.1 | 94 | 54 | 2.77 | 14.83 | |
| 08/10/2025 | 3.8 | 0.2 | 19.6 | 9.5 | 96 | 43 | 3.07 | 22.80 | |
| 09/10/2025 | 3.2 | 0.0 | 19.7 | 9.3 | 90 | 45 | 2.03 | 18.61 | |
| 10/10/2025 | 3.9 | 0.0 | 20.8 | 12.5 | 78 | 41 | 2.23 | 21.48 | |
| 11/10/2025 | 4.0 | 0.0 | 21.1 | 7.2 | 95 | 41 | 2.40 | 25.11 | |
| 12/10/2025 | 4.4 | 0.0 | 24.6 | 9.0 | 98 | 39 | 2.18 | 25.28 | |
| 13/10/2025 | 4.5 | 0.0 | 25.4 | 10.6 | 99 | 41 | 2.19 | 24.65 | |
| 14/10/2025 | 4.4 | 0.0 | 24.2 | 10.7 | 98 | 47 | 2.61 | 25.58 | |
| Totals: | 51.7 | 20.0 |
