When you have that feeling that today is abnormally hot or cold for the time of year, historical context is useful to see if intuition matches reality. Reuters has you covered with a climate monitor that shows global temperature against a normal year.
The dashboard view has an interactive globe, the now familiar multi-line chart that aligns past years by day, and a time series by continent.
Visualize This: The FlowingData Guide to Design, Visualization, and Statistics (2nd Edition)
