Disappointing July

I don't know...perhaps August may be better, but I would have expected July to produce some decent performance on the solar thermal. Having said that, I'm not at all disheartened because all I'm using the hot water for is washing up and handwash, and for the volume of water in the calorifier, I can't moan too much. Anything above 40C is good in my book, and temperatures on a variable day like today were pushing 60C. I really ought to leave the logger on long-term and see what the performance is like over a few days. Today in moderately overcast weather, the tank got hot enough for me.