British Columbia Canada Tmax , Tmin and Tmean from 1873 (On 1×1 Grid)

Step 1: Use Data from Environment Canada’s monthly summaries.

Step 2: Summarize the data by 1×1 grid square so no region dominates.

Step 3: Graph Tmax, Tmin and Tmean.

The black line is the monthly data. The blue boxes contain the 5 year mean (and I set the 5 year period by just going back from the most recent data in 5 year increments)

The green line is the number of 1×1 grid squares. The blue dashed line is the trend from 1873 (which is the earliest data).

(I won’t count the pre-1900 data as too important since there were so few stations)

Tmax was 1.5C  warmer in the the 1920s/30s/40s than now.

Tmin now is the hottest its been since 1900.

Tmean in the early 40s was slightly warmer than now.

Tmean/Tmin has been warming since 1970 thanks to Tmin … not Tmax.

Click for larger:

Tmax

Canada Monthly Summary Analysis - 1873 to 2015 - Tmax - 1x1 Grid - BC

Tmin

Canada Monthly Summary Analysis - 1873 to 2015 - Tmin - 1x1 Grid - BC

Tmean

Canada Monthly Summary Analysis - 1873 to 2015 - Tmean - 1x1 Grid - BC

 

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