Month

Number of storms

Average

Percentage %

Standard deviation

January

29

0.9

5.3

1.8

February

60

1.9

10.9

2.6

March

89

2.9

16.2

3.6

April

122

3.9

22.2

3.4

May

86

2.8

15.7

2.4

June

74

0.8

4.4

1.7

July

24

0.8

4.4

2.5

August

1

0.03

0.2

0.2

September

13

0.4

2.4

1

October

36

1.2

6.6

1.4

November

34

1.1

6.2

1.7

December

31

1

5.5

1