Evapotranspiration Calculations
Perth Airport Comparison - May 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) |
| 01/05/2026 | 3.0 | 0.4 | | 18.3 | 11.8 | 95 | 38 | 4.95 | 14.23 |
| 02/05/2026 | 2.3 | 0.2 | | 18.5 | 3.4 | 96 | 45 | 2.55 | 14.28 |
| 03/05/2026 | 2.3 | 0.0 | | 20.3 | 4.9 | 97 | 48 | 2.33 | 14.63 |
| 04/05/2026 | 2.9 | 0.0 | | 23.0 | 7.7 | 90 | 43 | 3.17 | 14.78 |
| 05/05/2026 | 3.3 | 0.0 | | 23.8 | 11.2 | 89 | 37 | 3.57 | 14.63 |
| 06/05/2026 | 3.8 | 0.0 | | 22.9 | 9.9 | 75 | 43 | 5.39 | 14.40 |
| 07/05/2026 | 4.0 | 0.0 | | 23.4 | 11.2 | 72 | 35 | 4.81 | 14.43 |
| 08/05/2026 | 4.1 | 0.0 | | 23.6 | 12.3 | 71 | 35 | 4.92 | 14.30 |
| 09/05/2026 | 4.4 | 0.0 | | 23.8 | 14.0 | 54 | 27 | 4.43 | 14.18 |
| 10/05/2026 | 4.0 | 0.0 | | 24.8 | 11.9 | 63 | 27 | 3.73 | 14.07 |
| 11/05/2026 | 4.4 | 0.0 | | 27.4 | 13.9 | 54 | 19 | 3.40 | 13.97 |
| 12/05/2026 | | 0.0 | | | 11.6 | 100 | 18 | 2.87 | 13.86 |
| 13/05/2026 | 3.1 | 0.0 | | 24.3 | 8.2 | 95 | 29 | 2.85 | 13.32 |
| 14/05/2026 | 1.9 | 0.0 | | 20.7 | 10.8 | 96 | 56 | 2.86 | 7.01 |
| 15/05/2026 | 2.1 | 1.4 | | 20.5 | 7.8 | 97 | 52 | 2.68 | 12.03 |
| 16/05/2026 | 2.0 | 0.4 | | 20.0 | 8.2 | 94 | 51 | 2.47 | 11.72 |
| 17/05/2026 | 2.2 | 0.0 | | 22.2 | 6.6 | 97 | 48 | 2.32 | 13.00 |
| Totals: | 49.8 | 2.4 | | | | | | | |
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