Evapotranspiration Calculations
Byron Bay (Cape Byron) - September 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/09/2025 | 1.8 | 2.0 | 17.8 | 12.3 | 98 | 73 | 3.81 | 9.53 | |
| 02/09/2025 | 2.8 | 3.8 | 21.0 | 13.0 | 94 | 66 | 4.67 | 15.09 | |
| 03/09/2025 | 3.4 | 0.0 | 23.0 | 14.0 | 89 | 63 | 4.05 | 19.45 | |
| 04/09/2025 | 3.3 | 0.0 | 22.3 | 15.1 | 92 | 65 | 4.42 | 18.81 | |
| 05/09/2025 | 4.5 | 0.0 | 21.4 | 16.5 | 88 | 46 | 7.65 | 19.74 | |
| 06/09/2025 | 3.5 | 1.2 | 19.8 | 15.2 | 87 | 56 | 8.02 | 13.45 | |
| 07/09/2025 | 0.0 | 14.3 | 80 | 45 | 4.30 | 20.02 | |||
| 08/09/2025 | 3.9 | 20.9 | 14.0 | 87 | 58 | 6.91 | 20.50 | ||
| 09/09/2025 | 3.7 | 0.0 | 22.8 | 17.1 | 88 | 66 | 6.06 | 19.06 | |
| 10/09/2025 | 2.6 | 0.0 | 21.7 | 18.0 | 93 | 70 | 5.21 | 11.21 | |
| 11/09/2025 | 5.0 | 0.6 | 20.4 | 14.7 | 91 | 33 | 8.25 | 21.03 | |
| 12/09/2025 | 3.4 | 0.0 | 18.7 | 12.6 | 83 | 58 | 6.81 | 16.09 | |
| 13/09/2025 | 2.9 | 2.0 | 21.6 | 13.7 | 95 | 63 | 3.73 | 15.28 | |
| 14/09/2025 | 4.2 | 0.2 | 23.7 | 15.6 | 80 | 53 | 3.98 | 21.36 | |
| 15/09/2025 | 4.0 | 0.0 | 22.0 | 15.2 | 84 | 60 | 4.86 | 21.59 | |
| 16/09/2025 | 4.3 | 0.0 | 22.2 | 16.1 | 85 | 56 | 6.40 | 21.72 | |
| 17/09/2025 | 3.5 | 0.0 | 22.7 | 18.8 | 96 | 75 | 6.79 | 21.89 | |
| 18/09/2025 | 3.2 | 0.0 | 21.4 | 18.7 | 96 | 79 | 7.42 | 20.80 | |
| 19/09/2025 | 3.6 | 0.0 | 24.2 | 18.5 | 96 | 72 | 4.39 | 20.77 | |
| 20/09/2025 | 2.8 | 0.0 | 22.7 | 19.8 | 93 | 59 | 5.09 | 8.17 | |
| Totals: | 66.4 | 9.8 |
