Yeah, Cloud is the bane of our lives
October/November is our first of two cloudy/Rain seasons so without ridiculous checking of data we do tend to get some cloud in some of the subs.
Hopefully we take enough data to cover this anyway
March to October or normally brill and we get some mixed months in between, It's normally October/November and late Feb-March/April but with Global warming being what it is over the last few years the exact time tends to skip around a little.
HTH
Steve