Evapotranspiration Calculations
Portland 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 | | | | 21.0 | | 100 | 37 | 4.86 | 13.99 |
| 02/04/2026 | 2.5 | 0.8 | | 20.4 | 10.5 | 100 | 62 | 4.73 | 13.58 |
| 03/04/2026 | 2.6 | 1.0 | | 17.2 | 8.0 | 94 | 43 | 3.47 | 13.15 |
| 04/04/2026 | 3.4 | 0.0 | | 17.9 | 10.2 | 73 | 47 | 5.03 | 16.30 |
| 05/04/2026 | 2.9 | 0.0 | | 22.3 | 7.8 | 95 | 41 | 2.65 | 15.27 |
| 06/04/2026 | 1.8 | 4.4 | | 22.6 | 12.7 | 100 | 76 | 4.01 | 8.04 |
| 07/04/2026 | | 4.2 | | | 13.3 | 100 | 64 | 4.71 | 6.08 |
| 08/04/2026 | 2.1 | 0.2 | | 18.4 | 6.9 | 86 | 50 | 1.96 | 12.03 |
| 09/04/2026 | | 0.0 | | | 12.3 | 100 | 58 | 6.86 | 12.43 |
| 10/04/2026 | | | | 15.5 | | 100 | 54 | 9.64 | 10.33 |
| 11/04/2026 | 2.5 | 6.6 | | 14.9 | 8.3 | 89 | 61 | 9.74 | 10.44 |
| 12/04/2026 | 1.9 | 5.2 | | 14.9 | 9.9 | 99 | 63 | 7.47 | 7.05 |
| 13/04/2026 | 1.3 | 4.2 | | 17.4 | 11.0 | 100 | 90 | 5.22 | 12.24 |
| 14/04/2026 | 2.0 | 4.8 | | 18.2 | 12.6 | 100 | 72 | 5.03 | 13.04 |
| 15/04/2026 | 1.0 | 4.8 | | 16.5 | 13.7 | 100 | 97 | 4.35 | 8.76 |
| 16/04/2026 | 1.5 | 7.4 | | 18.7 | 10.9 | 100 | 80 | 6.85 | 8.31 |
| 17/04/2026 | 2.3 | 2.2 | | 15.7 | 10.8 | 86 | 49 | 3.67 | 10.93 |
| 18/04/2026 | 1.9 | 0.4 | | 16.5 | 5.2 | 84 | 52 | 2.06 | 12.71 |
| 19/04/2026 | 2.9 | 0.0 | | 22.7 | 4.8 | 100 | 47 | 4.26 | 10.59 |
| 20/04/2026 | 1.7 | 0.0 | | 17.9 | 11.1 | 100 | 63 | 2.85 | 9.38 |
| 21/04/2026 | 2.8 | 0.0 | | 25.5 | 11.1 | 100 | 50 | 2.96 | 13.71 |
| 22/04/2026 | 3.1 | 0.0 | | 24.2 | 12.0 | 91 | 42 | 4.19 | 9.43 |
| 23/04/2026 | 3.4 | 0.0 | | 26.8 | 11.4 | 100 | 29 | 3.15 | 13.43 |
| 24/04/2026 | 3.5 | 0.0 | | 24.6 | 7.5 | 73 | 22 | 3.04 | 11.54 |
| 25/04/2026 | 4.8 | 0.0 | | 27.5 | 10.4 | 67 | 17 | 4.15 | 12.31 |
| 26/04/2026 | 2.7 | 0.0 | | 19.9 | 12.3 | 100 | 27 | 3.48 | 10.85 |
| Totals: | 54.6 | 46.2 | | | | | | | |
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