By Paul Homewood
Further to my earlier post on CET daily summer temperatures, I have been asked to plot the lowest daily max as well as the highest.
First, to recap, is the graph of top temperatures:
There is quite a contrast between that and the one of lowest temperatures:
Whereas the first graph shows no evidence of increasing temperatures since the summer of 1976 and 2003, at the other end of the scale there has been an absolute dearth of really cold days, with only two days below 13C since 1997.
This gives us a strong clue as to why average summer temperatures appear to be higher in recent years – it is not that days are getting hotter than before, it is because cold days are much less common.
As the chart below shows, over the period since 1878 there has been an increase in the linear trend.
But this summer certainly has not been anything to write home about, as, with an average maximum temperature of 20.4C, it ties as 35th hottest, along years such as 1878, 1897 and 1906.
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September 5, 2017 at 05:12AM
Iowa Climate Science Education 