Evapotranspiration Calculations
Sydney (Observatory Hill) - 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 | 3.1 | 0.0 | 27.0 | 19.0 | 50 | 20 | 0.00 | 22.61 | |
| 02/10/2025 | 2.9 | 0.0 | 25.4 | 15.5 | 46 | 23 | 0.00 | 21.82 | |
| 03/10/2025 | 3.0 | 0.0 | 25.5 | 12.1 | 56 | 23 | 0.00 | 23.18 | |
| 04/10/2025 | 3.4 | 0.0 | 24.5 | 13.6 | 85 | 47 | 0.00 | 22.74 | |
| 05/10/2025 | 3.4 | 0.0 | 25.9 | 13.8 | 91 | 30 | 0.00 | 23.19 | |
| 06/10/2025 | 2.6 | 0.0 | 31.8 | 16.1 | 93 | 23 | 0.00 | 15.35 | |
| 07/10/2025 | 2.2 | 3.8 | 22.7 | 16.3 | 92 | 63 | 0.00 | 12.57 | |
| 08/10/2025 | 3.4 | 0.0 | 28.3 | 15.8 | 80 | 29 | 0.00 | 22.51 | |
| 09/10/2025 | 1.7 | 0.0 | 26.9 | 20.0 | 64 | 36 | 0.00 | 7.80 | |
| 10/10/2025 | 3.7 | 0.0 | 30.6 | 17.0 | 85 | 17 | 0.00 | 24.38 | |
| 11/10/2025 | 3.5 | 0.0 | 30.5 | 17.5 | 54 | 14 | 0.00 | 24.73 | |
| 12/10/2025 | 2.6 | 0.0 | 31.7 | 18.4 | 70 | 19 | 0.00 | 15.14 | |
| 13/10/2025 | 3.2 | 0.2 | 23.6 | 15.1 | 63 | 30 | 0.00 | 22.34 | |
| 14/10/2025 | 3.8 | 0.2 | 27.1 | 13.4 | 88 | 31 | 0.00 | 25.23 | |
| Totals: | 42.5 | 4.2 |
