Canadians Cause Cool August

Weather videos have shown "cold" fronts coming from Canada.  Sometimes they don't say Canada.  They will say "arctic."  OK.  Sure.  It's the Canadians.  This time though, they've chosen to get arctic in August.  It's hardly even been 90º all summer, and it's not expected to reach 100º for the whole month of August.   How do the Canadians do this?  They have big fans and blow cold air down here.  I'm really grateful for the timing this time though.  August has been more like the beginning of fall.   Thank you Canada.