A few years ago I rasn the whole length -76 miles at the rate of a marathon a day for three days - very enjoyable - but would advise taking plenty of time as there is so much to see. Go prepared for everything - breathable waterproofs layers of thermals and good comfortable waterproof boots - it can get very boggy and rough underfoot. Then again you could have a drought with blazing hot weather - this is the North of England.
No such thing as bad weather - just the wrong clothes .
ENJOY!!