Evapotranspiration Calculations
Portland Airport - May 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) |
| 01/05/2026 | | | | 27.3 | | | | | 11.74 |
| 02/05/2026 | 3.8 | 0.0 | | 26.0 | 17.5 | 95 | 37 | 5.89 | 7.85 |
| 03/05/2026 | | 10.0 | | | 10.6 | 98 | 57 | 5.27 | 10.02 |
| 04/05/2026 | 1.4 | 0.4 | | 15.9 | 12.3 | 96 | 77 | 8.57 | 5.80 |
| 05/05/2026 | 1.6 | 10.2 | | 16.4 | 11.0 | 95 | 70 | 5.02 | 7.98 |
| 06/05/2026 | | 0.6 | | | 11.2 | 98 | 58 | 7.54 | 6.53 |
| 07/05/2026 | | | | 13.7 | | 95 | 49 | 8.63 | 7.80 |
| 08/05/2026 | 1.0 | 2.2 | | 14.8 | 10.2 | 98 | 86 | 6.64 | 7.01 |
| 09/05/2026 | 1.0 | 4.0 | | 15.5 | 11.5 | 98 | 84 | 2.24 | 8.13 |
| 10/05/2026 | 1.3 | 0.2 | | 16.5 | 11.2 | 99 | 67 | 3.02 | 6.59 |
| 11/05/2026 | 1.4 | 1.2 | | 16.6 | 10.6 | 99 | 61 | 2.19 | 11.02 |
| 12/05/2026 | 1.5 | 0.0 | | 20.2 | 7.8 | 99 | 68 | 2.80 | 10.91 |
| 13/05/2026 | 1.4 | 0.2 | | 20.9 | 8.3 | 100 | 65 | 2.60 | 7.68 |
| 14/05/2026 | 1.7 | 0.0 | | 20.9 | 9.0 | 92 | 61 | 2.75 | 9.37 |
| 15/05/2026 | 1.6 | 0.0 | | 19.6 | 10.4 | 91 | 63 | 3.43 | 6.88 |
| 16/05/2026 | 1.4 | 0.2 | | 16.8 | 14.6 | 99 | 64 | 4.08 | 4.84 |
| 17/05/2026 | 1.0 | 2.8 | | 17.0 | 12.3 | 99 | 77 | 1.34 | 9.18 |
| Totals: | 20.1 | 32.0 | | | | | | | |
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