I def. do NOT like sweating, lol.
You'll LOVE summers in England, then

A few years ago I was in London during a heat wave and it was around 92F, but that was abnormally hot for the summer, and I think broke records for the high temp. I'm in Scotland, but my in-laws are in London, so I'm there quite often. I think summers in London are really pleasant temperature-wise and are perfect for being outdoors, especially with the long days. If you ever do think it's too hot, you can head up north for a little break. Or, if it's too cold, you can get a very cheap, quick flight to a warm place somewhere in North Africa or Europe.
The one thing I definitely do not miss is tornadoes and extreme seasons. You don't get the 100F summers and -10F winters like many places in the US, or the horrible natural disasters. We rarely get thunderstorms, but where I am, we have had a few in the past year - the only ones since I've been here, actually.