Present day is in the right side.
On the other axis its showing the temp.s in Celsius
No, the site does not state on where they got the information from.
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOuo0CsIPhzNx3dfrhaW28UNtr26hnQsv8rlRRg7lD8HSP3w7upfQwV4o-CUK-QmUsvjPKVXK4LnRmTMn2RtwydujJSZxEM4W50XiBO9VGNw-0fYq1oebvNeS8MYwDfjBc09BA3f9PcJk/s1600/temp.+graph.jpg
