Evapotranspiration Calculations
Colac (Mount Gellibrand) - October 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) |
| 01/10/2026 | 1.3 | 2.4 | | 14.8 | 13.3 | 100 | 77 | 3.95 | 5.47 |
| 02/10/2026 | 1.1 | 21.8 | | 12.9 | 10.1 | 100 | 88 | 7.53 | 8.27 |
| 03/10/2026 | 0.9 | 16.0 | | 12.6 | 10.8 | 100 | 89 | 11.85 | 6.75 |
| 04/10/2026 | 2.5 | 11.2 | | 16.2 | 6.0 | 99 | 69 | 3.78 | 19.20 |
| 05/10/2026 | 2.2 | 0.2 | | 15.2 | 6.3 | 95 | 73 | 2.53 | 15.71 |
| 06/10/2026 | 2.8 | 0.0 | | 15.1 | 7.5 | 97 | 59 | 9.47 | 16.92 |
| 07/10/2026 | 2.8 | 0.0 | | 14.0 | 6.6 | 98 | 64 | 5.96 | 22.46 |
| 08/10/2026 | 3.9 | 0.0 | | 21.2 | 6.1 | 100 | 52 | 5.58 | 22.95 |
| 09/10/2026 | 4.9 | 0.2 | | 24.0 | 9.1 | 87 | 47 | 8.05 | 18.00 |
| 10/10/2026 | 3.7 | 0.0 | | 19.4 | 9.8 | 98 | 57 | 9.96 | 19.65 |
| 11/10/2026 | 4.7 | 0.0 | | 22.8 | 10.2 | 96 | 51 | 9.37 | 23.01 |
| 12/10/2026 | 3.0 | 1.0 | | 15.3 | 12.4 | 100 | 58 | 9.61 | 18.72 |
| 13/10/2026 | | 0.0 | | | 6.1 | 100 | 62 | 7.77 | 17.21 |
| 14/10/2026 | 2.4 | 0.0 | | 12.7 | 5.3 | 88 | 60 | 5.10 | 14.67 |
| 15/10/2026 | 3.4 | 0.0 | | 17.2 | 5.6 | 96 | 57 | 6.79 | 22.82 |
| 16/10/2026 | 4.3 | 0.0 | | 22.1 | 9.0 | 97 | 48 | 5.89 | 20.92 |
| 17/10/2026 | 5.1 | 0.0 | | 24.1 | 10.4 | 94 | 39 | 5.55 | 22.76 |
| 18/10/2026 | 5.1 | 0.0 | | 26.3 | 11.6 | 89 | 43 | 4.22 | 23.46 |
| 19/10/2026 | 6.2 | 0.0 | | 26.4 | 12.9 | 91 | 39 | 7.84 | 23.96 |
| 20/10/2026 | 5.9 | 0.0 | | 28.1 | 17.1 | 94 | 45 | 7.59 | 21.41 |
| 21/10/2026 | 3.5 | 0.0 | | 23.3 | 12.7 | 100 | 65 | 4.10 | 19.63 |
| 22/10/2026 | 6.8 | 0.2 | | 30.2 | 12.4 | 100 | 30 | 5.51 | 25.24 |
| 23/10/2026 | 6.6 | 0.0 | | 30.5 | 14.9 | 100 | 42 | 9.52 | 19.44 |
| 24/10/2026 | 1.8 | 0.4 | | 18.8 | 12.3 | 100 | 85 | 4.07 | 10.56 |
| 25/10/2026 | 1.2 | 20.8 | | 11.7 | 11.6 | 100 | 84 | 5.21 | 6.54 |
| 26/10/2026 | 2.8 | 13.6 | | 14.7 | 4.3 | 100 | 58 | 7.28 | 17.26 |
| Totals: | 88.9 | 87.8 | | | | | | | |
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