Evapotranspiration Calculations
Pyrenees (Ben Nevis) - October 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) |
| 01/10/2026 | 1.9 | 1.4 | | 13.8 | 12.6 | 99 | 51 | 4.96 | 4.55 |
| 02/10/2026 | 1.2 | 36.4 | | 10.3 | 7.3 | 99 | 91 | 6.78 | 12.48 |
| 03/10/2026 | 1.7 | 14.4 | | 13.2 | 7.4 | 100 | 83 | 6.93 | 14.21 |
| 04/10/2026 | 2.7 | 0.8 | | 14.7 | 3.8 | 99 | 67 | 4.18 | 22.14 |
| 05/10/2026 | 2.3 | 0.0 | | 13.9 | 5.2 | 95 | 50 | 2.74 | 13.45 |
| 06/10/2026 | 2.0 | 0.0 | | 10.8 | 5.9 | 98 | 62 | 6.28 | 12.78 |
| 07/10/2026 | 3.1 | 3.2 | | 15.0 | 2.2 | 88 | 58 | 3.63 | 22.98 |
| 08/10/2026 | 4.3 | 0.0 | | 18.5 | 4.4 | 75 | 45 | 6.26 | 23.22 |
| 09/10/2026 | 4.5 | 0.0 | | 20.9 | 11.1 | 98 | 37 | 7.26 | 18.78 |
| 10/10/2026 | 2.9 | 0.0 | | 16.0 | 6.1 | 99 | 57 | 3.08 | 19.11 |
| 11/10/2026 | 4.3 | 0.0 | | 19.8 | 8.0 | 97 | 40 | 4.91 | 23.70 |
| 12/10/2026 | 2.8 | 6.2 | | 15.1 | 9.6 | 99 | 60 | 6.56 | 17.88 |
| 13/10/2026 | 2.4 | 0.0 | | 10.1 | 4.1 | 96 | 56 | 7.39 | 16.49 |
| 14/10/2026 | 2.1 | 0.0 | | 9.1 | 1.9 | 89 | 63 | 4.63 | 15.36 |
| 15/10/2026 | 2.8 | 0.0 | | 14.0 | 3.1 | 88 | 61 | 7.16 | 18.70 |
| 16/10/2026 | 3.7 | 0.0 | | 16.7 | 6.0 | 85 | 55 | 8.50 | 21.73 |
| 17/10/2026 | 4.9 | 0.0 | | 18.8 | 8.6 | 79 | 41 | 7.66 | 24.36 |
| 18/10/2026 | 5.1 | 0.0 | | 21.2 | 9.0 | 66 | 46 | 6.06 | 24.26 |
| 19/10/2026 | 5.8 | 0.0 | | 22.8 | 13.9 | 62 | 42 | 6.66 | 22.82 |
| 20/10/2026 | 5.6 | 0.0 | | 23.5 | 15.3 | 66 | 41 | 5.80 | 21.65 |
| 21/10/2026 | 4.8 | 0.0 | | 24.9 | 14.2 | 74 | 45 | 2.98 | 23.27 |
| 22/10/2026 | 7.3 | 0.0 | | 26.1 | 15.6 | 62 | 34 | 7.65 | 25.57 |
| 23/10/2026 | 6.2 | 0.0 | | 26.3 | 14.4 | 83 | 37 | 6.85 | 22.95 |
| 24/10/2026 | 2.1 | 8.0 | | 19.1 | 12.4 | 96 | 68 | 3.38 | 8.87 |
| 25/10/2026 | 0.7 | 39.2 | | 9.0 | 9.0 | 100 | 95 | 7.57 | 5.10 |
| 26/10/2026 | 2.4 | 6.6 | | 11.9 | 2.0 | 99 | 62 | 6.27 | 18.02 |
| Totals: | 89.6 | 116.2 | | | | | | | |
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