Evapotranspiration Calculations

Perth Metro - December 2025 daily calculations

DateEvapotrans-
piration (mm) 0000- 2400
Rain (mm) 0900- 0900Pan Evaporation (mm) 0900- 0900Max TempMin TempMax Rel Hum (%)Min Rel Hum (%)Average 10m Wind Speed (m/sec)Solar Radiation (MJ/sq m)
01/12/20258.50.0 39.016.47882.6231.41
02/12/20256.70.0 33.216.884252.2928.26
03/12/20256.10.0 25.616.785473.8731.43
04/12/20256.20.0 25.614.673453.7831.44
05/12/20255.90.0 24.115.570444.0328.09
06/12/20256.70.0 28.014.973383.4331.69
07/12/20256.50.0 27.715.085373.1231.74
08/12/20256.50.0 28.316.787473.6731.78
09/12/2025 0.0  16.779512.9731.83
10/12/20258.1  34.516.866273.2331.84
11/12/20257.60.0 32.418.279333.4131.83
12/12/20258.90.0 35.719.463213.6931.87
13/12/20259.00.0 36.918.263183.5231.93
14/12/20257.90.0 40.122.383193.6419.83
15/12/20257.415.2 33.922.383362.5231.96
16/12/20256.40.0 30.721.398502.4430.93
17/12/20256.10.0 24.620.279474.3528.92
18/12/20257.50.0 31.116.174293.3931.93
Totals:122.015.2       

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