According to the Environment Canada “Normals” (the stations EC calculates anomalies for) , Canada was colder than the 1971-2000 average in April 2013.

The mean of all the “Normals” was -1.83C colder than 1971-2000 average.

If you look in the top left corder of the anomaly map and note the black circle represents 5C anomalies. Blue is colder than normal. Red is warmer.

The middle of the country was really, really cold. What little warmth there was, was concentrated in a handful of arctic stations.

And many of the stations had values too small to really show up on the map.

The anomaly map for April 2013 follows. Click to make it bigger.

Where do I get the data? From Environment Canada monthly summaries.

The URL for April 2013 BC data is here. You can replace BC with nothing (PROV=) or SASK or MAN etc.

I use the data with a D column  value because EC calculates the anomalies for me. And because they are supposed to be better/long stations.