Evapotranspiration Calculations
Portland Airport - January 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) |
| 01/01/2026 | 3.4 | 0.0 | | 16.9 | 11.2 | 80 | 62 | 5.12 | 17.03 |
| 02/01/2026 | 4.4 | 0.0 | | 20.4 | 13.3 | 98 | 64 | 5.33 | 28.89 |
| 03/01/2026 | 1.5 | 0.0 | | 17.4 | 15.0 | 100 | 88 | 3.71 | 8.26 |
| 04/01/2026 | 4.4 | 0.0 | | 20.0 | 13.3 | 98 | 57 | 4.15 | 26.53 |
| 05/01/2026 | 4.7 | 0.0 | | 21.5 | 5.7 | 100 | 53 | 1.82 | 31.61 |
| 06/01/2026 | 6.0 | 0.0 | | 25.8 | 9.0 | 100 | 21 | 2.51 | 31.51 |
| 07/01/2026 | 9.2 | 0.0 | | 37.3 | 14.0 | 73 | 17 | 4.75 | 24.49 |
| 08/01/2026 | 5.0 | 0.0 | | 22.7 | 16.7 | 93 | 45 | 4.72 | 23.53 |
| 09/01/2026 | 4.5 | 0.2 | | 25.9 | 15.7 | 91 | 43 | 6.91 | 8.84 |
| Totals: | 43.1 | 0.2 | | | | | | | |
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