Table 1: Some meteorological variables for the study station during both growing seasons (2017 and 2018), and the average of last twenty years.

Climate Parameter	Year/Month	Apr.	May	Jun.	Jul.
Minimum temperature (0C)	2017	9.7	14.4	17.2	20.6
	2018	10.0	15.6	18.2	19.8
	20-year average	10.1	14.1	17.6	19.3
Maximum temperature (0C)	2017	26.2	31.6	35.7	40.6
	2018	27.2	31.5	34.6	36.9
	20-year average	25.3	30.4	35.0	37.4
Mean temperature (0C)	2017	19.2	24.9	28.4	31.1
	2018	19.9	25.7	27.7	28.8
	20-year average	18.1	23.6	27.7	29.4
Relative air humidity (%)	2017	63.1	57.9	56.3	56.0
	2018	54.8	51.5	59.6	55.6
	20-year average	60.9	56.5	56.3	60.7
Reference evapotranspiration, ET0 (mm)	2017	5.7	7.6	9.0	10.3
	2018	6.8	7.8	8.8	10.3
	20-year average	5.6	7.5	9.4	10.4
Precipitation (mm)	2017	0.0	0.0	0.0	0.0
	2018	14	0.0	0.0	0.0
	20-year average	5.9	4.2	0.0	0.0