Someone on IRC commented "You can tell it's spring because there's snow and fog," but no, that's just snow. 10-15cm in the last two days, in fact, after a couple weeks of 5-10 C temperatures.
Remember to count the number of newspapers that run an equinox story about making an egg stand on its end.
(I'm reading Martin Gardner's Did Adam and Eve have navels? right now, and there's a good section in there about egg-standing and pseudoscience in the news.)