Evapotranspiration Calculations
Merriwa (Roscommon) - September 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) |
|---|---|---|---|---|---|---|---|---|---|
| 01/09/2026 | 3.6 | 0.0 | 23.6 | 1.7 | 98 | 38 | 3.30 | 17.69 | |
| 02/09/2026 | 4.8 | 0.0 | 25.6 | 6.3 | 90 | 32 | 5.02 | 18.23 | |
| 03/09/2026 | 4.9 | 0.0 | 23.9 | 11.9 | 86 | 40 | 7.45 | 18.34 | |
| 04/09/2026 | 3.8 | 0.0 | 23.5 | 5.2 | 96 | 29 | 2.90 | 18.72 | |
| 05/09/2026 | 7.0 | 0.0 | 29.8 | 4.5 | 94 | 25 | 7.33 | 18.39 | |
| 06/09/2026 | 3.9 | 0.0 | 21.3 | 8.2 | 86 | 39 | 4.39 | 19.00 | |
| 07/09/2026 | 3.4 | 0.0 | 22.8 | 3.0 | 98 | 36 | 2.57 | 18.88 | |
| 08/09/2026 | 3.4 | 0.0 | 19.4 | 7.1 | 94 | 40 | 4.03 | 17.54 | |
| 09/09/2026 | 3.8 | 0.0 | 21.9 | 0.2 | 98 | 31 | 3.70 | 17.64 | |
| 10/09/2026 | 0.0 | 4.9 | 90 | 39 | 4.91 | 19.46 | |||
| 11/09/2026 | 21.7 | 98 | 40 | 2.91 | 19.59 | ||||
| 12/09/2026 | 3.3 | 0.0 | 23.4 | 6.0 | 98 | 26 | 1.70 | 18.05 | |
| 13/09/2026 | 3.1 | 0.0 | 25.0 | 2.7 | 95 | 29 | 1.38 | 17.46 | |
| 14/09/2026 | 4.3 | 0.0 | 27.4 | 3.8 | 92 | 30 | 2.57 | 19.75 | |
| 15/09/2026 | 5.6 | 0.0 | 28.2 | 8.4 | 83 | 30 | 4.83 | 20.19 | |
| Totals: | 54.9 | 0.0 |
