If you are unlucky enough to be in the wrong place (up a mountain, far north, winter) of course it's cold - cold enough to kill you. This week for example we went to see Leonard Cohen at Edinburgh Castle, which is on a hill but has walls which shelter the huge parade ground where the concerts are held. By 9pm it was cold enough for anyone who had not brought a coat, hat, blanket for their legs or whatever to be uncomfortable but most people (like me) were wearing just a T-shirt and a normal sort of coat. It started raining five minutes before the concert ended, but we have had torrential rain for the last two weeks and my area is actually cut off from the south-west direction for heavy vehicles. 60 metres of road fell into the River Esk when one month's rain fell in two hours.
I used my Konica Minolta Dimage A2 to get one reasonable video clip of the concert - I actually took it just for a few stills, and I wish I had taken the A700 because they were allowing DSLRs in and people were taking photographs freely with no interference from security. It's probably the best concert I have ever been too for sound quality, civilised audience, and reasonable security without huge queues or crushes. Here's the clip:http://www.youtube.com/watch?v=QV5QKnX6krc
But sure, in Scotland though it rarely gets to low temperatures now in Edinburgh (below freezing is rare), rain and wind plus cold nights in summer can surprise visitors. It can feel so warm during the day you assume it's going to be OK after sunset, but it gets chilly quickly. The best thing is that in summer, you can be shooting hand-held at 10pm outdoors. I was testing the Canon 1000D and wanted to do some fairground shots, but the fair had closed at 9.30pm, so I walked back slowly shooting buildings with their lights coming on as it got darker. I was using 1600 ISO but getting quite decent hand-held pix: