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. 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 -0.13C/decade. The big surprise is Ontario. The last time I did this it was warming. Here are the trends for each province.
All -0.13 BC -0.20 ALTA -0.35 SASK -0.53 MAN -0.56 ONT -0.13 QUE 0.25 NS 0.12 NB 0.23 NFLD 0.35 PEI 0.26 NWT -0.22 YT -0.22 NU 0.54
And here are the graphs for each province and then one more for the whole country. Click For bigger.