Evapotranspiration Calculations
Perth Airport - 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 | 2.3 | 1.8 | | 17.6 | 8.6 | 97 | 43 | 3.56 | 12.60 |
| 02/08/2026 | 2.8 | 0.2 | | 17.4 | 5.3 | 85 | 43 | 5.05 | 14.27 |
| 03/08/2026 | 3.9 | 0.0 | | 25.0 | 9.4 | 88 | 23 | 3.83 | 14.17 |
| 04/08/2026 | 2.4 | 8.4 | | 20.3 | 13.0 | 98 | 48 | 3.17 | 13.93 |
| 05/08/2026 | 2.2 | 0.0 | | 20.4 | 8.8 | 93 | 53 | 2.79 | 12.55 |
| 06/08/2026 | 2.4 | 0.0 | | 20.6 | 5.7 | 95 | 52 | 3.29 | 13.01 |
| 07/08/2026 | 2.4 | 5.6 | | 20.0 | 11.4 | 98 | 53 | 3.54 | 12.88 |
| 08/08/2026 | 1.8 | 14.4 | | 11.7 | 9.0 | 97 | 60 | 7.06 | 8.83 |
| 09/08/2026 | 2.0 | 3.6 | | 17.6 | 5.7 | 97 | 56 | 2.47 | 14.60 |
| 10/08/2026 | 2.0 | 9.8 | | 17.9 | 10.2 | 97 | 64 | 5.27 | 8.52 |
| 11/08/2026 | 2.2 | 10.6 | | 17.0 | 1.7 | 98 | 48 | 2.81 | 15.23 |
| 12/08/2026 | 2.3 | 0.0 | | 18.8 | 3.7 | 97 | 47 | 2.45 | 15.38 |
| 13/08/2026 | 2.4 | 0.2 | | 20.2 | 3.2 | 98 | 42 | 2.09 | 15.53 |
| 14/08/2026 | 3.5 | 0.0 | | 22.5 | 5.6 | 96 | 29 | 3.57 | 15.32 |
| 15/08/2026 | 3.9 | 0.0 | | 23.2 | 10.8 | 69 | 25 | 3.50 | 15.84 |
| 16/08/2026 | 4.4 | 0.0 | | 24.2 | 11.8 | 63 | 28 | 4.23 | 16.03 |
| 17/08/2026 | 3.2 | 0.0 | | 19.6 | 10.9 | 92 | 41 | 6.33 | 8.23 |
| 18/08/2026 | | 8.4 | | | 7.1 | 95 | 46 | 2.75 | 11.16 |
| 19/08/2026 | 2.7 | 0.4 | | 21.0 | 10.3 | 97 | 48 | 2.93 | 15.71 |
| 20/08/2026 | 2.6 | 0.0 | | 20.6 | 6.9 | 97 | 49 | 2.91 | 14.55 |
| 21/08/2026 | 2.9 | 0.0 | | 23.8 | 6.1 | 99 | 36 | 1.96 | 16.74 |
| 22/08/2026 | 2.7 | 0.0 | | 20.7 | 11.9 | 88 | 56 | 4.24 | 10.79 |
| 23/08/2026 | 3.0 | 1.8 | | 20.8 | 10.7 | 96 | 50 | 4.30 | 15.49 |
| 24/08/2026 | 2.3 | 2.0 | | 19.7 | 7.4 | 98 | 47 | 2.06 | 14.03 |
| 25/08/2026 | 2.6 | 0.0 | | 21.1 | 7.8 | 95 | 54 | 3.38 | 13.88 |
| 26/08/2026 | 2.4 | 0.0 | | 21.4 | 11.4 | 97 | 63 | 4.03 | 11.69 |
| Totals: | 67.3 | 67.2 | | | | | | | |
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