The wind on the fells can have a major impact on air temperature, and should not be underestimated, below is a chart showing just how much of a difference the wind speeds can make. Wind speeds also increase with altitude, the speed on the top of the fell can easily be double that at sea level.
Wind (Mph)
|
Temperature (Celsius)
|
|||||||
|
10
|
5
|
0
|
-5
|
-10
|
-15
|
-20
|
-25
|
10
|
5
|
-1
|
-7
|
-13
|
-19
|
-25
|
-31
|
-37
|
---|---|---|---|---|---|---|---|---|
20
|
0
|
-6
|
-13
|
-20
|
-27
|
-34
|
-41
|
-48
|
30
|
-1
|
-9
|
-16
|
-24
|
-31
|
-39
|
-46
|
-54
|
40
|
-2
|
-10
|
-18
|
-26
|
-34
|
-41
|
-49
|
-57
|
50
|
-3
|
-11
|
-19
|
-27
|
-35
|
-43
|
-50
|
-58
|
60
|
-3
|
-11
|
-19
|
-27
|
-35
|
-43
|
-50
|
-58
|
70
|
-3
|
-10
|
-18
|
-26
|
-34
|
-42
|
-50
|
-57
|
80
|
-2
|
-10
|
-17
|
-25
|
-33
|
-40
|
-48
|
-56
|
90
|
-1
|
-9
|
-16
|
-24
|
-31
|
-39
|
-46
|
-54
|