In 2017 I observed on 118 nights from home. I count observations in the morning and evening of the same day as one clear night but an observing session that spans midnight as two clear nights. In 2016 I only managed 99 clear nights. I don’t keep a record of how many clear nights there are when I’m not at home or doing something else (tut-tut) but I was under clear skies at astrocamps or other observing sessions away from home on 6 occassions last year that are not in my stats.
The best month was a tie between March and November and the worst month was June.
Things have started well this year with a 100% clear sky record…but it is only Jan 2nd!