23 May 2016 – After waking up to snow and a daytime high of just 5.5 C yesterday, it should be of no surprise that this was an historically cold weekend in Calgary.
In fact, 2016 is on track to be one of the coldest May long weekends over the past 40 years.
So far the mean temperature for the 2016 May long weekend is under 5 C.
The coldest Victoria Day long weekends since 1976 were back-to-back in the early 2000s. 2003 and 2004, with temperatures ranging from -5.1 to 14.2 C in 2003 and -0.8 to 13.8 C in 2004. Their respective mean temperatures averaged over the four days came out to 4.2 C in 2003 and 5.4 C in 2004.
Thanks to Argiris Diamantis for this link