Evapotranspiration Calculations
Rolleston Airport - April 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) |
| 01/04/2026 | 4.6 | 0.0 | | 30.6 | 16.2 | 100 | 41 | 2.97 | 19.17 |
| 02/04/2026 | 5.0 | 0.0 | | 31.6 | 16.9 | 93 | 33 | 2.51 | 21.77 |
| 03/04/2026 | 5.2 | 0.0 | | 31.7 | 16.4 | 89 | 29 | 2.69 | 21.22 |
| 04/04/2026 | 5.3 | 0.0 | | 30.9 | 18.2 | 82 | 34 | 3.42 | 19.61 |
| 05/04/2026 | 4.9 | 0.0 | | 30.2 | 14.6 | 88 | 35 | 3.04 | 19.81 |
| 06/04/2026 | 4.7 | 0.0 | | 30.5 | 15.4 | 94 | 30 | 2.27 | 21.43 |
| 07/04/2026 | 4.2 | 0.0 | | 32.5 | 13.4 | 90 | 28 | 1.25 | 21.38 |
| 08/04/2026 | 4.4 | 0.0 | | 33.8 | 16.0 | 85 | 25 | 1.36 | 21.04 |
| 09/04/2026 | 4.6 | 0.0 | | 33.7 | 15.7 | 79 | 27 | 1.59 | 21.05 |
| 10/04/2026 | 4.1 | 0.0 | | 33.0 | 16.1 | 89 | 32 | 1.16 | 20.90 |
| 11/04/2026 | 4.4 | 0.0 | | 34.5 | 16.4 | 88 | 29 | 1.35 | 20.68 |
| 12/04/2026 | 5.7 | 0.0 | | 31.0 | 20.4 | 69 | 22 | 3.28 | 20.55 |
| 13/04/2026 | 5.3 | 0.0 | | 27.7 | 9.6 | 64 | 18 | 3.28 | 20.39 |
| 14/04/2026 | 4.8 | 0.0 | | 29.2 | 8.0 | 71 | 19 | 2.50 | 20.20 |
| 15/04/2026 | 4.4 | 0.0 | | 30.6 | 12.2 | 67 | 28 | 1.99 | 19.88 |
| 16/04/2026 | 4.1 | 0.0 | | 30.4 | 14.3 | 87 | 32 | 1.74 | 19.57 |
| 17/04/2026 | 3.1 | 0.0 | | 29.1 | 18.1 | 75 | 45 | 1.27 | 14.37 |
| 18/04/2026 | 4.3 | 0.0 | | 32.7 | 20.1 | 79 | 26 | 1.77 | 18.51 |
| 19/04/2026 | 4.6 | 0.0 | | 31.7 | 13.2 | 63 | 22 | 2.04 | 19.10 |
| 20/04/2026 | 3.7 | 0.0 | | 30.5 | 16.9 | 76 | 28 | 1.41 | 17.77 |
| 21/04/2026 | 3.8 | 0.0 | | 29.0 | 13.4 | 82 | 24 | 1.69 | 18.39 |
| 22/04/2026 | 3.6 | 0.0 | | 28.4 | 11.7 | 83 | 27 | 1.54 | 17.86 |
| 23/04/2026 | 4.1 | 0.0 | | 28.1 | 11.4 | 79 | 27 | 2.47 | 17.27 |
| 24/04/2026 | 4.6 | 0.0 | | 28.1 | 11.3 | 84 | 22 | 2.92 | 18.50 |
| 25/04/2026 | 4.6 | 0.0 | | 27.4 | 11.7 | 78 | 32 | 3.56 | 17.45 |
| 26/04/2026 | 4.0 | 0.0 | | 26.8 | 12.2 | 80 | 34 | 2.79 | 17.14 |
| Totals: | 116.1 | 0.0 | | | | | | | |
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