Evapotranspiration Calculations

Rolleston 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)
01/01/2026	4.7	0.4		32.3	21.4	97	36	1.97	17.76
02/01/2026	4.7	0.0		31.4	22.3	98	44	2.12	18.80
03/01/2026	6.0	2.0		32.8	18.0	100	32	2.20	25.88
04/01/2026	4.3	0.2		31.5	18.5	88	36	1.63	16.59
05/01/2026	6.7	0.0		34.4	22.4	90	33	2.35	27.28
06/01/2026	6.7	4.6		34.6	19.6	99	28	2.47	27.40
07/01/2026	8.2	0.0		34.8	19.8	87	27	4.05	30.50
08/01/2026	8.2	0.0		35.0	19.8	80	28	4.24	29.03
09/01/2026	6.5	0.0		32.1	18.3	85	36	3.59	24.88
Totals:	56.0	7.2

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