2017 was my worst year for clear nights since 2006. I managed to record useful photometry and/or spectroscopy on 102 out of the 273 nights when I was available to observe. Assuming this is representative of the whole year, observing should have been possible on 37.4% of nights. In 2016, the equivalent figure was 45.3%. The best months in 2017 were March, August and November and the worst February and September.
During 2017 I measured 25427 photometry images and recorded 2333 spectra.
Best wishes for clearer skies in 2018!
David