A few weeks ago I threw together a little analysis of the average temperature and seasonal variation in temperature of a bunch of world cities:
A friend submitted it to the Accursed Orange Website. Some of the discussion there was interesting. Many people asserted that minimizing seasonal variation in temperature is an unrealistic way of explicating what makes weather "nice". In particular, there were jokes about how highly-ranked Reykjavík was.
Well, I spent a week in Reykjavík last month and the weather was perfect (for me) the whole time. Of course, as I mention in the original write-up, I probably have somewhat unusual preferences about weather.