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 |
| 11/12/2025 | 3.2 | 0.8 | | 26.4 | 19.4 | 91 | 46 | 0.00 | 16.68 |
| 12/12/2025 | 1.5 | 3.0 | | 22.7 | 19.0 | 93 | 76 | 0.00 | 6.52 |
| 13/12/2025 | 4.7 | 1.6 | | 27.3 | 16.5 | 96 | 56 | 0.00 | 26.30 |
| 14/12/2025 | 5.5 | 6.2 | | 32.5 | 18.5 | 95 | 39 | 0.00 | 30.15 |
| 15/12/2025 | 4.1 | 0.2 | | 26.4 | 19.1 | 84 | 51 | 0.00 | 22.71 |
| 16/12/2025 | 1.9 | 0.6 | | 23.8 | 16.8 | 88 | 54 | 0.00 | 8.64 |
| 17/12/2025 | 5.2 | 0.2 | | 27.4 | 18.1 | 86 | 52 | 0.00 | 29.60 |
| 18/12/2025 | 5.8 | 0.0 | | 30.8 | 18.8 | 84 | 48 | 0.00 | 31.81 |
| Totals: | 77.1 | 14.2 | | | | | | | |
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