Evapotranspiration Calculations
Rolleston Airport - September 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) |
| 01/09/2025 | 3.7 | 0.0 | | 24.9 | 7.3 | 85 | 28 | 2.23 | 17.74 |
| 02/09/2025 | 3.7 | 0.0 | | 25.4 | 9.2 | 99 | 27 | 1.87 | 19.97 |
| 03/09/2025 | 4.1 | 0.0 | | 27.0 | 7.0 | 86 | 20 | 1.90 | 20.86 |
| 04/09/2025 | 3.3 | 0.0 | | 27.5 | 7.5 | 82 | 27 | 1.19 | 17.34 |
| 05/09/2025 | 4.2 | 0.0 | | 29.5 | 12.3 | 78 | 23 | 1.72 | 20.07 |
| 06/09/2025 | 5.1 | 0.0 | | 28.5 | 10.5 | 91 | 23 | 3.05 | 21.39 |
| 07/09/2025 | 4.6 | 0.0 | | 27.7 | 10.7 | 94 | 28 | 2.56 | 21.33 |
| 08/09/2025 | 4.3 | 0.0 | | 28.3 | 9.0 | 98 | 27 | 1.96 | 21.36 |
| 09/09/2025 | 4.0 | 0.0 | | 28.8 | 8.7 | 85 | 28 | 1.34 | 21.69 |
| 10/09/2025 | 4.9 | 0.0 | | 30.9 | 16.7 | 89 | 33 | 2.94 | 19.21 |
| 11/09/2025 | 5.5 | 0.0 | | 26.6 | 14.3 | 60 | 17 | 3.24 | 21.79 |
| 12/09/2025 | 4.7 | 0.0 | | 25.1 | 8.0 | 72 | 21 | 2.73 | 21.82 |
| 13/09/2025 | 4.1 | 0.0 | | 25.6 | 8.8 | 70 | 23 | 2.11 | 18.02 |
| 14/09/2025 | 4.7 | 0.0 | | 27.4 | 10.5 | 88 | 25 | 2.69 | 20.58 |
| 15/09/2025 | 5.0 | 0.0 | | 28.4 | 9.4 | 82 | 24 | 2.56 | 22.23 |
| 16/09/2025 | 4.7 | 0.0 | | 30.0 | 10.2 | 93 | 26 | 1.99 | 22.26 |
| 17/09/2025 | 4.6 | 0.0 | | 32.9 | 18.9 | 79 | 22 | 1.26 | 22.01 |
| 18/09/2025 | 4.9 | 0.0 | | 34.8 | 15.2 | 70 | 24 | 1.50 | 21.29 |
| 19/09/2025 | 5.9 | 0.0 | | 33.7 | 18.6 | 80 | 22 | 2.57 | 22.69 |
| 20/09/2025 | 3.9 | 0.0 | | 29.3 | 15.5 | 75 | 34 | 1.70 | 16.53 |
| Totals: | 89.9 | 0.0 | | | | | | | |
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