mph

mph

mph

Jan

8.9

8.9

Feb

9.2

9.2

Mar

9.8

9.8

Apr

11.0

11.0

May

11.2

11.2

Jun

11.2

11.2

Jul

9.6

9.6

Aug

10.1

10.1

Sep

9.2

9.2

Oct

7.2

7.6

7.4

Nov

7.8

4.9

6.3

Dec

6.5

6.5

Mean, all data

7.2

9.6

Mean of months

7.2

9.4

9.2