Has anybody else noticed improved mobile phone reception in the winter? Mobile reception seems to be worse in the summer, when it is humid and the leaves are on the trees???
Any other reason?
Or does it make no difference?

My poor signal on Orange improves if theres snow which is reflects the signal. The leafs falling from the trees can also help.

More Info here:

http://www.wb2vvv.net/uploads/vvv.800-900.pdf

Largely irrelevant in terms of Orange who use the 1.8GHz spectrum, although the same principle i'm guessing.

Low cloud cover in winter helps "bounce" the signal further

Where did you get that from? mobile cells broadcast outwards and operate on a short range. They don't broadcast like TV and radio broadcasts on Horizontal and Vertical aerials.

Do you have anything to support this claim as it doesn't make sense to me.

Here's an example of forensic analysis on a cell site which highlights the fact that the signals travel outwards.

http://www.forensicfocus.com/checkin...-site-analysis

Simply put it travels through less dense cold air further.

Snow on anything including the transmitter will degrade signal.. but the really cold air you get at the same time as snow can make it seem the opposite.

But isn't cold air denser than warm air ?

.... Unless you have hugely humid air and I don't think uk has anything like that type.

But it does! Its just not hot so we dont feel it! Check out the humidity levels today in London http://news.bbc.co.uk/weather/forecast/8

95% today!