Evapotranspiration Calculations
Sydney (Observatory Hill) - January 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) |
| 01/01/2026 | 1.7 | 2.8 | | 21.5 | 17.9 | 94 | 51 | 0.00 | 7.77 |
| 02/01/2026 | 3.6 | 3.0 | | 26.0 | 17.3 | 95 | 50 | 0.00 | 19.87 |
| 03/01/2026 | 4.0 | 2.4 | | 26.1 | 17.5 | 94 | 57 | 0.00 | 21.70 |
| 04/01/2026 | 4.3 | 0.2 | | 32.3 | 19.7 | 93 | 49 | 0.00 | 22.04 |
| 05/01/2026 | 4.3 | 1.2 | | 29.2 | 19.2 | 92 | 49 | 0.00 | 23.13 |
| 06/01/2026 | 5.4 | 0.0 | | 29.7 | 20.3 | 88 | 54 | 0.00 | 29.01 |
| 07/01/2026 | 6.0 | 0.0 | | 30.4 | 20.7 | 95 | 57 | 0.00 | 31.41 |
| 08/01/2026 | 6.0 | 0.0 | | 33.2 | 21.5 | 92 | 43 | 0.00 | 31.56 |
| 09/01/2026 | 6.0 | 0.0 | | 33.3 | 21.3 | 90 | 46 | 0.00 | 31.48 |
| 10/01/2026 | 6.0 | 0.0 | | 42.2 | 23.0 | 85 | 18 | 0.00 | 31.43 |
| 11/01/2026 | 0.7 | 0.0 | | 22.0 | 21.1 | 87 | 62 | 0.00 | 1.18 |
| 12/01/2026 | 2.0 | 5.2 | | 21.6 | 17.5 | 93 | 65 | 0.00 | 9.59 |
| 13/01/2026 | 4.7 | 3.6 | | 28.1 | 18.5 | 95 | 63 | 0.00 | 25.53 |
| 14/01/2026 | 3.8 | 0.2 | | 27.3 | 21.0 | 90 | 57 | 0.00 | 19.79 |
| 15/01/2026 | 3.0 | 3.6 | | 27.0 | 19.9 | 87 | 70 | 0.00 | 14.73 |
| 16/01/2026 | 3.9 | 0.2 | | 28.1 | 20.0 | 89 | 57 | 0.00 | 20.22 |
| 17/01/2026 | 2.0 | 1.2 | | 23.4 | 20.6 | 95 | 78 | 0.00 | 9.00 |
| 18/01/2026 | 2.6 | 126.8 | | 24.8 | 18.6 | 97 | 62 | 0.00 | 13.24 |
| 19/01/2026 | 3.9 | 7.6 | | 25.9 | 18.2 | 95 | 56 | 0.00 | 21.66 |
| 20/01/2026 | 3.9 | 2.8 | | 26.0 | 17.4 | 93 | 51 | 0.00 | 21.93 |
| 21/01/2026 | 4.8 | 0.0 | | 26.4 | 16.8 | 90 | 47 | 0.00 | 28.10 |
| 22/01/2026 | 3.4 | 0.0 | | 25.1 | 18.4 | 80 | 55 | 0.00 | 18.45 |
| 23/01/2026 | 3.5 | 0.0 | | 24.8 | 18.1 | 76 | 46 | 0.00 | 19.97 |
| 24/01/2026 | 5.3 | 0.0 | | 27.7 | 17.9 | 89 | 55 | 0.00 | 30.26 |
| 25/01/2026 | 5.6 | 0.0 | | 32.6 | 20.1 | 95 | 52 | 0.00 | 29.54 |
| 26/01/2026 | 3.0 | 0.0 | | 25.8 | 21.7 | 81 | 57 | 0.00 | 15.06 |
| 27/01/2026 | 4.9 | 0.0 | | 27.7 | 19.7 | 71 | 52 | 0.00 | 27.97 |
| 28/01/2026 | 5.2 | 0.0 | | 28.5 | 18.1 | 85 | 52 | 0.00 | 29.77 |
| 29/01/2026 | 5.2 | 0.0 | | 29.5 | 21.8 | 85 | 48 | 0.00 | 28.06 |
| 30/01/2026 | 5.2 | 0.0 | | 29.5 | 20.5 | 88 | 55 | 0.00 | 28.09 |
| Totals: | 123.9 | 160.8 | | | | | | | |
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