leaf length

leaf width

leaf area

May

average temperature (˚C)

1

0.35

0.44

rainfall (mm)

0.35

1

1

sunshine hours (h)

−0.1

−0.97

−0.94

June

average temperature (˚C)

0.44

1

1

rainfall (mm)

−0.99

−0.49

−0.58

sunshine hours (h)

0.92

0.69

0.75

July

average temperature (˚C)

0.39

0.999*

0.998*

rainfall (mm)

−0.96

−0.07

−0.17

sunshine hours (h)

−0.91

−0.71

−0.77

August

average temperature (˚C)

0.45

0.99

1.000**

rainfall (mm)

−0.88

0.13

0.03

sunshine hours (h)

0.91

0.71

0.77

September

average temperature (˚C)

0.43

1

1.000**

rainfall (mm)

−0.98

−0.16

−0.26

sunshine hours (h)

−0.91

−0.71

−0.77