Back in August 2013 I wrote about a very hot previous month in Switzerland (July 2013 in Switzerland - a hot month (graph)). The data was collected from a temperature sensor integrated in Icinga (Nagios) monitoring and automatically graphed with an interval of one minute.
Now there's one year of data collected and the hot month of July 2013 was a lot hotter than this year. It's interesting to see that Switzerland can have peaks of more than 30 degrees Celsius (24 hour average!) but also around 0 degrees, even though the winter 2013/2014 was pretty mild.
Here's the graphic for temperatures in Zurich, Switzerland from end of June 2013 - July 25th 2014: