On Wednesday, August 2, 2017 at 9:22:39 AM UTC+1, wrote:
Perhaps I'm wrong, but to me this summer seems to have been constantly
humid down here in London regardless of temperature or cloud cover. Is this
actually the case or am I imagining it?

--
Spud

You're not imagining it.

Skybus from Lands End to Scilly are having a terrible year of flight cancellations due to cliff top fog & warm sector mist.

I noticed on teletext the MetO said Shetland was sunnier than Cornwall in July, quite possibly. What amused me though was the precise figure for sunshine (153.3 hours IIRC) for a the whole of Cornwall County of moorland, opposite facing coasts, 100 mules from near Bude to Lands End. Given the unsettled nature of the month, I suspect that it ranged from approx just over 100 hours over some inland moors, and areas badly affected by the regular sea breeze convergence cloud which occurred during the month (Camborne did really badly for this reason), to 200 hours on some favoured headlands. For what it's worth there was 184 hours on the moors behind Penzance, about 90% of normal for that spot, so must have been 200 hours in Penzance.

Graham
Penzance