Table 2 The descriptive characteristics of weather variables

Air temperature, °C

7.5 (8.9)

−2.52

1.0

7.8

14.8

26.6

Daily change in air temperature

0 (2.4)

−14.1

−1.4

0

1.4

17.7

Atmospheric pressure, hPa

1015 (9.6)

976

1009

1015

1021

1050

Daily change in atmospheric pressure

0 (6.0)

−36.8

−3.4

0

3.5

32.9

Relative humidity, %

80.4 (12)

37

73

82

89

100

Daily change in relative humidity

0 (7.8)

−34

−5

0

4

39

Wind speed, m/s

5.3 (2.0)

1

4

5

6

15

Cloud cover, okta

3.5 (1.6)

0.3

2.4

3.3

4.5

11.5

AO index

−0.12 (1.5)

−5.80

−0.95

−0.06

0.79

4.70

NAO index

−0.06 (0.8)

−3.25

−0.58

− 0.02

0.51

2.39

NINO3.4 index

−0.07 (0.8)

−2.20

−0.60

0.00

0.50

1.90

EA/WR indices

−0.17 (0.9)

−2.05

−0.85

− 0.25

0.46

1.79

SCA indices

0.06 (0.9)

−2.33

−0.53

0.00

0.68

2.11