Evapotranspiration Calculations
Perth Metro - August 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) |
| 01/08/2026 | 1.9 | 6.0 | | 17.7 | 10.3 | 99 | 45 | 2.21 | 12.63 |
| 02/08/2026 | 1.8 | 0.0 | | 17.5 | 4.6 | 98 | 45 | 1.60 | 14.29 |
| 03/08/2026 | 2.3 | 0.0 | | 25.3 | 6.6 | 89 | 26 | 1.25 | 14.10 |
| 04/08/2026 | 1.9 | 9.0 | | 20.0 | 12.7 | 99 | 48 | 1.43 | 13.59 |
| 05/08/2026 | 1.7 | 0.0 | | 20.4 | 8.0 | 99 | 54 | 1.14 | 12.53 |
| 06/08/2026 | 1.8 | 0.0 | | 20.3 | 6.1 | 99 | 52 | 1.57 | 12.71 |
| 07/08/2026 | 2.0 | 5.2 | | 19.7 | 11.6 | 99 | 56 | 2.12 | 12.65 |
| 08/08/2026 | 1.8 | 17.2 | | 12.0 | 10.5 | 97 | 48 | 3.84 | 9.33 |
| 09/08/2026 | 1.7 | 7.6 | | 17.6 | 7.2 | 99 | 60 | 1.16 | 14.61 |
| 10/08/2026 | 1.9 | 9.8 | | 17.4 | 10.4 | 99 | 58 | 3.57 | 9.70 |
| 11/08/2026 | 1.7 | 16.4 | | 16.1 | 2.5 | 99 | 52 | 1.21 | 14.91 |
| 12/08/2026 | 1.8 | 0.0 | | 18.7 | 4.0 | 99 | 51 | 1.18 | 15.14 |
| 13/08/2026 | 2.1 | 0.2 | | 20.5 | 4.0 | 99 | 40 | 1.28 | 15.59 |
| 14/08/2026 | 2.3 | 0.0 | | 22.7 | 6.5 | 99 | 31 | 1.30 | 15.50 |
| 15/08/2026 | 2.5 | 0.0 | | 23.9 | 6.0 | 96 | 27 | 1.27 | 15.81 |
| 16/08/2026 | 3.2 | 0.0 | | 24.2 | 7.1 | 94 | 28 | 2.45 | 16.04 |
| 17/08/2026 | 2.3 | 0.0 | | 19.6 | 10.8 | 97 | 48 | 3.51 | 9.12 |
| 18/08/2026 | 2.0 | 5.4 | | 18.9 | 7.8 | 98 | 44 | 1.38 | 13.69 |
| 19/08/2026 | 2.2 | 0.2 | | 20.9 | 10.9 | 99 | 50 | 1.36 | 15.30 |
| 20/08/2026 | 2.0 | 0.2 | | 20.0 | 7.8 | 99 | 51 | 1.47 | 12.84 |
| 21/08/2026 | 2.4 | 0.0 | | 23.8 | 6.7 | 99 | 35 | 1.05 | 16.74 |
| 22/08/2026 | 2.1 | 0.0 | | 21.0 | 10.7 | 93 | 55 | 1.80 | 11.65 |
| 23/08/2026 | 2.6 | 2.0 | | 20.5 | 11.6 | 98 | 54 | 2.67 | 16.14 |
| 24/08/2026 | 2.1 | 2.4 | | 20.0 | 8.6 | 99 | 43 | 0.96 | 15.30 |
| 25/08/2026 | 2.5 | 0.0 | | 21.1 | 8.8 | 95 | 53 | 2.56 | 14.72 |
| 26/08/2026 | 2.1 | 0.0 | | 21.3 | 11.5 | 99 | 64 | 2.64 | 11.44 |
| Totals: | 54.7 | 81.6 | | | | | | | |
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