London, Canada VS London, England

I like the daily means - they provide a quick, at-a-glance comparison of the entire day rather than having to do it myself with a calculator to discern whether spring or fall is warmer, how exactly these numbers compare to my actual or dream climates, etc. I definitely think annual mean temperatures can be used to make misleading comparisons, but I do think they're very useful as an overall statistic - and I prefer having the means too for aesthetic reasons, particularly if there are big diurnal ranges and the discrepancy in color between the average highs and lows would be jarring.

I also tend to use rainfall and snowfall in my weather boxes - I do think solid and liquid precipitation should be separate, but maybe that's just me as a number freak. What I don't like, though, are met services that don't report snowfall averages, even for climates that obviously get a lot of snow.