Evapotranspiration Calculations
St Helens Aerodrome - July 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/07/2026 | 0.8 | 7.0 | 16.7 | 11.2 | 97 | 74 | 2.59 | 5.24 | |
| 02/07/2026 | 0.9 | 4.8 | 14.4 | 10.9 | 98 | 76 | 4.23 | 4.50 | |
| 03/07/2026 | 1.1 | 9.2 | 15.3 | 6.7 | 95 | 50 | 2.64 | 7.38 | |
| 04/07/2026 | 1.3 | 0.0 | 14.3 | 5.1 | 87 | 43 | 2.77 | 7.70 | |
| 05/07/2026 | 1.0 | 0.0 | 11.6 | 4.2 | 86 | 58 | 2.95 | 6.73 | |
| 06/07/2026 | 0.7 | 0.0 | 12.2 | 7.3 | 94 | 66 | 1.55 | 5.21 | |
| 07/07/2026 | 0.8 | 0.0 | 13.4 | 5.2 | 91 | 56 | 1.89 | 7.88 | |
| 08/07/2026 | 0.6 | 0.0 | 11.6 | 5.3 | 98 | 78 | 2.20 | 5.71 | |
| 09/07/2026 | 2.6 | 4.9 | 98 | 80 | 1.67 | 5.59 | |||
| 10/07/2026 | 98 | 59 | 2.17 | 7.99 | |||||
| 11/07/2026 | 1.1 | 14.5 | 3.4 | 98 | 59 | 3.16 | 7.51 | ||
| 12/07/2026 | 1.5 | 1.2 | 13.6 | 5.3 | 90 | 55 | 4.88 | 7.34 | |
| 13/07/2026 | 1.9 | 0.4 | 15.1 | 9.8 | 87 | 57 | 6.53 | 7.23 | |
| 14/07/2026 | 1.2 | 5.4 | 14.1 | 6.5 | 94 | 49 | 2.69 | 6.30 | |
| 15/07/2026 | 1.1 | 0.0 | 15.1 | 3.5 | 95 | 60 | 2.55 | 5.49 | |
| 16/07/2026 | 1.2 | 0.2 | 17.2 | 4.6 | 97 | 61 | 3.10 | 8.54 | |
| Totals: | 15.2 | 30.8 |
