Evapotranspiration Calculations
Pyrenees (Ben Nevis) - 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 | 1.6 | 5.4 | 10.5 | 3.7 | 100 | 71 | 4.03 | 11.12 | |
| 02/10/2025 | 1.3 | 5.6 | 8.0 | 1.8 | 100 | 80 | 5.53 | 11.96 | |
| 03/10/2025 | 1.8 | 0.4 | 13.5 | 3.2 | 99 | 77 | 6.10 | 14.19 | |
| 04/10/2025 | 3.8 | 0.2 | 18.4 | 7.0 | 97 | 41 | 4.04 | 22.26 | |
| 05/10/2025 | 4.2 | 0.0 | 21.1 | 11.3 | 99 | 30 | 5.99 | 13.10 | |
| 06/10/2025 | 2.4 | 4.2 | 11.3 | 4.0 | 99 | 55 | 7.47 | 16.04 | |
| 07/10/2025 | 1.9 | 0.0 | 9.9 | 2.0 | 90 | 68 | 3.02 | 15.07 | |
| 08/10/2025 | 2.4 | 0.0 | 14.2 | 4.4 | 96 | 61 | 3.53 | 15.06 | |
| 09/10/2025 | 2.3 | 0.0 | 14.1 | 4.6 | 99 | 57 | 3.55 | 14.35 | |
| 10/10/2025 | 2.0 | 0.0 | 13.3 | 4.5 | 99 | 61 | 4.71 | 10.91 | |
| 11/10/2025 | 2.7 | 0.2 | 14.7 | 5.5 | 99 | 50 | 3.86 | 15.84 | |
| 12/10/2025 | 1.8 | 1.6 | 11.8 | 4.6 | 99 | 71 | 5.18 | 11.68 | |
| 13/10/2025 | 2.9 | 3.8 | 12.6 | 0.9 | 100 | 51 | 3.43 | 23.20 | |
| 14/10/2025 | 3.1 | 0.0 | 15.4 | 2.6 | 97 | 54 | 3.94 | 22.58 | |
| Totals: | 34.2 | 21.4 |
