Environment Canada publishes monthly summaries here. The data included Tmax, Tmean, Tmin and Normals (the D column). The Normals column is “Mean Temperature difference from Normal (1971-2000) (°C)”. These are supposedly the higher quality stations. Only some of the stations get a Normals value.

I could just look at the stations with Normals and summarize the data. But some of the stations are close together. So I thought why not summarize the data by 1×1 grid square and then summarize the grid squares.

Correction: I left the green line out of these graphs –   The green line is the count of grid squares with data in them. That is dropping like a stone. (I will discuss this in another post).

And why not see what happens from 1998. We know 1998 is a pivot point in climate.

The trend for the whole country from 1998 is cooling at -0.32C/decade. Saskatchewan and Manitoba are cooling at over -.8 C /decade.  Wow.

Here are the trends for each province.

All Provinces -0.32 C/decade

ALTA -0.61
BC -0.3 
MAN -0.86 
NB 0.06 
NFLD 0.15 
NS 0.02 
NU 0.47 
NWT -0.36 
ONT -0.38 
PEI 0.1 
QUE 0.01 
SASK -0.8 
YT -0.21

And here are the graphs for each province and then one more for the whole country. Click For bigger.