Double agree with this suggestion - as I've split my life between hemispheres, weatherspark has been enormously useful for explaining relative climates to new and old friends, but I always have to edit the comparison graphs myself to put summer in the middle before sharing so you can actually compare the differences.
Same here. Funny enough they seem to have done the adjustment for the similar cities feature (“far-away foreign places with temperatures most similar”) but when you click to compare them the charts are all unadjusted.
