This is definitely a "captain obvious" observation, but it's interesting to see just how much bad weather here in the Veneto is correlated with traffic to my real-time weather site, http://www.meteo-veneto.net

The precipitation and insolation numbers for the month of September – as well as the radar images for the site itself – come from http://www.arpa.veneto.it/

The numbers are all normalized so as to make them easy to compare.  The cloudy/dark numbers are the inverse of the insolation for the month, and could probably be fiddled with to be a bit more accurate – it's obvious that the number increases as the month goes on, with less sunlight.