Evapotranspiration Calculations

Portland Airport - January 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)
01/01/20263.40.0 16.911.280625.1217.03
02/01/20264.40.0 20.413.398645.3328.89
03/01/20261.50.0 17.415.0100883.718.26
04/01/20264.40.0 20.013.398574.1526.53
05/01/20264.70.0 21.55.7100531.8231.61
06/01/20266.00.0 25.89.0100212.5131.51
07/01/20269.20.0 37.314.073174.7524.49
08/01/20265.00.0 22.716.793454.7223.53
09/01/20264.50.2 25.915.791436.918.84
10/01/20264.90.6 19.612.884569.6526.81
11/01/20264.30.0 17.912.376474.1621.92
12/01/20264.00.0 19.412.076524.2818.82
13/01/20263.70.0 19.013.678564.5316.62
14/01/20262.60.0 18.512.896695.4812.43
15/01/20261.80.0 19.014.7100806.378.45
16/01/20263.411.0 20.314.2100687.4520.06
17/01/20266.50.2 22.515.389297.6828.43
18/01/20267.20.0 25.615.293206.5927.88
19/01/2026 0.0  16.0100694.0910.33
20/01/20266.0  22.515.8100244.5229.80
21/01/20263.70.2 18.613.7100344.6514.39
22/01/20264.90.2 19.512.477394.2024.90
23/01/2026 0.0  9.291224.1729.87
24/01/2026   39.3 97105.5027.83
25/01/20264.70.0 20.614.596564.5728.92
26/01/20267.00.0 27.212.6100114.3029.22
27/01/20268.40.0 35.515.1100124.3426.43
28/01/20262.00.0 19.215.0100693.688.20
29/01/20262.10.0 18.715.1100714.249.60
30/01/20265.10.0 21.815.2100223.0325.98
Totals:125.412.4       

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