Guardian: Weather is what happens. Climate is the sum of what happens, averaged over a generation or more. The unpromising start to the British summer, and the apparent recent trend towards cool, wet summers, are just that: an unpromising start, and an apparent trend. Neither is in itself an indicator of climate change. Rain in June does not mean that global warming is not happening. A succession of disappointing summers does not mean that in a warmer world Britain can expect mild winters and wet summers as...