Evapotranspiration Calculations
Portland Airport - August 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) |
| 01/08/2026 | 1.2 | 0.0 | | 13.8 | 3.1 | 100 | 61 | 2.65 | 10.60 |
| 02/08/2026 | 2.0 | 0.2 | | 15.1 | 2.2 | 99 | 45 | 4.47 | 11.46 |
| 03/08/2026 | 1.7 | 9.8 | | 13.3 | 6.3 | 95 | 65 | 8.16 | 9.13 |
| 04/08/2026 | 1.4 | 7.0 | | 13.9 | 8.2 | 94 | 72 | 5.49 | 8.73 |
| 05/08/2026 | 0.9 | 0.4 | | 12.8 | 5.1 | 97 | 79 | 2.46 | 6.58 |
| 06/08/2026 | 0.9 | 2.8 | | 14.1 | 4.2 | 98 | 82 | 3.37 | 6.92 |
| 07/08/2026 | 1.2 | 2.6 | | 15.4 | 5.7 | 96 | 68 | 2.07 | 10.58 |
| 08/08/2026 | 1.8 | 0.0 | | 16.4 | 8.8 | 94 | 61 | 4.57 | 7.90 |
| 09/08/2026 | 1.0 | 7.2 | | 13.8 | 9.7 | 99 | 77 | 3.52 | 5.02 |
| 10/08/2026 | 1.3 | 6.0 | | 14.0 | 9.7 | 100 | 70 | 5.15 | 7.50 |
| 11/08/2026 | 1.7 | 0.2 | | 15.3 | 7.7 | 95 | 67 | 5.40 | 11.11 |
| 12/08/2026 | 1.8 | 5.0 | | 14.7 | 9.3 | 97 | 67 | 7.58 | 10.37 |
| 13/08/2026 | 1.6 | 5.6 | | 14.9 | 10.3 | 96 | 70 | 6.98 | 8.10 |
| 14/08/2026 | 1.4 | 2.0 | | 15.0 | 10.2 | 99 | 73 | 3.93 | 9.90 |
| 15/08/2026 | 1.0 | 1.4 | | 12.9 | 7.1 | 98 | 69 | 0.91 | 7.84 |
| 16/08/2026 | 1.4 | 1.8 | | 14.3 | 4.7 | 100 | 64 | 2.67 | 12.00 |
| 17/08/2026 | 1.7 | 0.0 | | 16.9 | 5.4 | 100 | 66 | 3.29 | 13.30 |
| 18/08/2026 | 1.5 | 0.2 | | 16.4 | 6.9 | 98 | 73 | 4.38 | 9.78 |
| 19/08/2026 | 2.1 | 7.2 | | 17.6 | 10.4 | 96 | 64 | 6.77 | 9.67 |
| 20/08/2026 | 1.3 | 1.2 | | 13.9 | 9.9 | 97 | 79 | 5.40 | 7.53 |
| 21/08/2026 | 1.7 | 8.4 | | 15.2 | 9.6 | 96 | 72 | 6.83 | 10.87 |
| 22/08/2026 | 2.0 | 4.2 | | 14.5 | 10.4 | 96 | 62 | 6.20 | 12.52 |
| 23/08/2026 | 1.5 | 0.4 | | 14.4 | 7.4 | 96 | 66 | 3.33 | 9.56 |
| 24/08/2026 | 1.4 | 0.2 | | 15.9 | 9.7 | 96 | 73 | 2.98 | 8.49 |
| 25/08/2026 | 1.3 | 2.4 | | 15.2 | 10.4 | 99 | 74 | 3.53 | 7.13 |
| 26/08/2026 | 1.8 | 1.0 | | 14.6 | 6.1 | 95 | 58 | 2.99 | 13.26 |
| Totals: | 38.6 | 77.2 | | | | | | | |
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