Evapotranspiration Calculations
Portland Airport - October 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) |
| 01/10/2025 | 2.2 | 11.0 | | 14.7 | 8.7 | 100 | 70 | 9.85 | 15.72 |
| 02/10/2025 | 2.4 | 14.4 | | 14.1 | 6.8 | 95 | 67 | 11.13 | 15.68 |
| 03/10/2025 | 2.1 | 3.0 | | 15.3 | 10.2 | 99 | 79 | 8.02 | 16.72 |
| 04/10/2025 | 4.3 | 0.2 | | 23.9 | 6.2 | 99 | 39 | 3.80 | 21.64 |
| 05/10/2025 | 4.0 | 0.0 | | 20.3 | 13.0 | 100 | 30 | 8.25 | 5.85 |
| 06/10/2025 | 3.3 | 12.4 | | 13.8 | 9.8 | 82 | 52 | 7.31 | 17.90 |
| 07/10/2025 | 1.9 | 0.4 | | 14.6 | 8.4 | 94 | 65 | 2.40 | 11.36 |
| 08/10/2025 | 2.8 | 0.2 | | 17.5 | 9.7 | 99 | 60 | 7.40 | 13.52 |
| 09/10/2025 | 3.2 | 8.6 | | 15.8 | 9.1 | 95 | 60 | 9.70 | 21.76 |
| 10/10/2025 | 3.3 | 3.2 | | 16.5 | 10.6 | 93 | 60 | 11.69 | 18.28 |
| 11/10/2025 | 2.2 | 1.8 | | 15.3 | 10.8 | 98 | 75 | 9.01 | 16.20 |
| 12/10/2025 | 2.6 | 7.2 | | 15.6 | 9.7 | 97 | 64 | 7.41 | 16.02 |
| 13/10/2025 | 2.3 | 7.0 | | 13.4 | 3.5 | 94 | 53 | 3.94 | 12.16 |
| 14/10/2025 | | 1.8 | | | 9.5 | 97 | 63 | 6.78 | 22.53 |
| Totals: | 36.6 | 71.2 | | | | | | | |
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