2021 was statistically one of the poorest years for observing since I started recording this in 2005. I calculate my results on the basis of the number of nights I was able to record useful data relative to the number of nights I was at home and potentially able to observe, so it is a measure of the fraction of observable nights in the year. My average for the year was 35.5% based on 118 nights out of 332. The best months were April and September, as they usually are, and the worst were January, November and December, again as usual.
Best wishes for clearer skies in 2022.
David