Evapotranspiration Calculations
Colac (Mount Gellibrand) - 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 | 2.3 | 3.2 | 15.0 | 6.5 | 100 | 69 | 12.94 | 16.34 | |
| 02/10/2025 | 1.3 | 6.0 | 12.5 | 5.6 | 99 | 85 | 14.61 | 13.08 | |
| 03/10/2025 | 1.6 | 2.2 | 14.3 | 6.7 | 100 | 85 | 9.66 | 16.36 | |
| 04/10/2025 | 3.5 | 0.8 | 20.8 | 6.7 | 100 | 57 | 4.76 | 20.88 | |
| 05/10/2025 | 4.3 | 0.0 | 21.7 | 9.1 | 100 | 44 | 12.07 | 10.16 | |
| 06/10/2025 | 2.6 | 10.6 | 12.7 | 7.4 | 99 | 59 | 8.41 | 19.24 | |
| 07/10/2025 | 2.4 | 0.0 | 13.7 | 7.1 | 92 | 65 | 9.03 | 14.11 | |
| 08/10/2025 | 3.6 | 0.0 | 17.3 | 5.2 | 96 | 54 | 10.23 | 20.85 | |
| 09/10/2025 | 3.2 | 0.2 | 16.0 | 7.1 | 99 | 53 | 12.14 | 16.66 | |
| 10/10/2025 | 3.8 | 0.8 | 18.0 | 8.2 | 95 | 55 | 16.63 | 18.62 | |
| 11/10/2025 | 2.8 | 0.4 | 16.2 | 8.9 | 98 | 63 | 11.51 | 15.10 | |
| 12/10/2025 | 2.6 | 8.2 | 15.9 | 7.6 | 100 | 65 | 10.18 | 16.53 | |
| 13/10/2025 | 2.8 | 5.2 | 13.9 | 3.8 | 97 | 57 | 3.73 | 21.52 | |
| 14/10/2025 | 3.1 | 0.2 | 15.9 | 6.3 | 95 | 64 | 8.61 | 22.00 | |
| Totals: | 39.9 | 37.8 |
