In reply to CraigDuncan99:
I am really unsure what you are looking for here.
There has been no trend positive or negative in 20 odd years of my Scottish winter climbing, just good years and poor years.
Asking on here you will get skewed responses, if a climber has a good season, ie gets out lots, he will tend to record it as good conditions. Getting out lots of course depends on many more variables than just the conditions, work, cash, family, partners etc. Last winter I had a bumper season but the conditions were not exceptional. My opportunities and weather windows coincided well.
Far better data than the perceptions of climbers can be sourced from the met office, Mwis, sais etc.