Update: See bottom map for fun.
Using the stations in Canada with Environment Canada calculated anomalies, here is the month of May visualized using the mean temperature for each station for each day.
You might have to click on the image or refresh the page to restart it.
The black circle in the top left corner represents a 5 Celsius anomaly from the 1971-2000 average.
Blue are below normal. Red above.
I thought I would map just the stations that were exactly average just for fun: