Evapotranspiration Calculations
Pyrenees (Ben Nevis) - December 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) |
| 01/12/2025 | 2.5 | 4.6 | | 11.0 | 3.7 | 99 | 67 | 7.29 | 21.16 |
| 02/12/2025 | 3.2 | 3.0 | | 15.4 | 3.8 | 99 | 58 | 4.36 | 21.76 |
| 03/12/2025 | 6.3 | 0.0 | | 24.9 | 5.7 | 89 | 27 | 3.94 | 31.18 |
| 04/12/2025 | 7.9 | 0.0 | | 28.9 | 12.4 | 78 | 15 | 5.78 | 24.94 |
| 05/12/2025 | 7.7 | 0.0 | | 27.8 | 12.6 | 62 | 19 | 4.78 | 29.79 |
| 06/12/2025 | 2.2 | 0.6 | | 12.7 | 9.6 | 99 | 53 | 5.79 | 8.37 |
| 07/12/2025 | 4.6 | 4.4 | | 16.6 | 2.5 | 96 | 39 | 5.34 | 30.66 |
| 08/12/2025 | 5.7 | 0.2 | | 23.1 | 5.2 | 70 | 36 | 3.58 | 30.03 |
| 09/12/2025 | 5.2 | 0.0 | | 19.2 | 8.5 | 99 | 37 | 4.62 | 31.10 |
| 10/12/2025 | 4.0 | 0.0 | | 17.2 | 9.3 | 75 | 31 | 4.53 | 14.01 |
| 11/12/2025 | 6.7 | 0.0 | | 22.3 | 9.1 | 54 | 22 | 4.81 | 29.84 |
| 12/12/2025 | 7.2 | 0.0 | | 27.1 | 13.2 | 81 | 22 | 5.02 | 28.77 |
| 13/12/2025 | 5.8 | 0.8 | | 26.2 | 15.0 | 83 | 31 | 5.13 | 19.19 |
| 14/12/2025 | 4.6 | 1.6 | | 16.7 | 6.9 | 96 | 37 | 7.65 | 25.02 |
| 15/12/2025 | 4.1 | 0.0 | | 13.9 | 3.4 | 97 | 48 | 6.81 | 31.43 |
| 16/12/2025 | 6.0 | 0.0 | | 21.6 | 4.0 | 94 | 15 | 3.56 | 32.15 |
| 17/12/2025 | 7.3 | 0.0 | | 30.8 | 10.2 | 46 | 12 | 2.58 | 31.84 |
| 18/12/2025 | 9.7 | 0.0 | | 35.0 | 20.9 | 31 | 12 | 4.13 | 32.19 |
| Totals: | 100.7 | 15.2 | | | | | | | |
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