Regarding American "histrionics" about weather - the English transplants I knew in Texas were always freaking out about the major weather events like hurricanes, tornados, flash floods, droughts, hailstorms, violent winds... Like they were completely stunned. No stiff upper lip at all.
I suppose it's an ego blow to remind the English that their weather is kind of dull (yes, dull), but it's hardly histrionics. It's like taking somebody who lives on a mountain to climb your hill and expecting them to be impressed by the view.