Evapotranspiration Calculations
Sydney (Observatory Hill) - December 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/12/2025 | 3.4 | 0.0 | 24.6 | 15.0 | 59 | 26 | 0.00 | 20.64 | |
| 02/12/2025 | 4.7 | 0.0 | 22.9 | 13.3 | 63 | 35 | 0.00 | 31.22 | |
| 03/12/2025 | 5.0 | 0.0 | 26.3 | 14.0 | 75 | 42 | 0.00 | 31.41 | |
| 04/12/2025 | 5.3 | 0.0 | 29.6 | 16.4 | 85 | 36 | 0.00 | 31.35 | |
| 05/12/2025 | 5.3 | 0.0 | 37.8 | 18.2 | 74 | 12 | 0.00 | 31.01 | |
| 06/12/2025 | 4.3 | 0.0 | 33.8 | 22.5 | 61 | 26 | 0.00 | 23.25 | |
| 07/12/2025 | 2.5 | 1.6 | 23.5 | 19.8 | 81 | 39 | 0.00 | 12.50 | |
| 08/12/2025 | 4.7 | 0.0 | 27.2 | 18.1 | 86 | 55 | 0.00 | 25.86 | |
| 09/12/2025 | 5.8 | 0.0 | 31.9 | 18.8 | 92 | 45 | 0.00 | 31.33 | |
| 10/12/2025 | 4.2 | 0.0 | 28.3 | 18.3 | 90 | 54 | 0.00 | 22.63 | |
| Totals: | 45.2 | 1.6 |
